biome_js_parser 0.5.7

Biome's JavaScript parser
Documentation
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JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: USING_KW@0..6 "using" [] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@6..8 "a" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@8..10 "=" [] [Whitespace(" ")],
                            expression: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@10..11 "b" [] [],
                                },
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@11..12 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: USING_KW@12..19 "using" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@19..21 "c" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@21..23 "=" [] [Whitespace(" ")],
                            expression: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@23..24 "d" [] [],
                                },
                            },
                        },
                    },
                    COMMA@24..26 "," [] [Whitespace(" ")],
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@26..28 "e" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@28..30 "=" [] [Whitespace(" ")],
                            expression: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@30..31 "_" [] [],
                                },
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@31..32 ";" [] [],
        },
        JsExpressionStatement {
            expression: JsAssignmentExpression {
                left: JsComputedMemberAssignment {
                    object: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@32..39 "using" [Newline("\n")] [Whitespace(" ")],
                        },
                    },
                    l_brack_token: L_BRACK@39..40 "[" [] [],
                    member: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@40..41 "g" [] [],
                        },
                    },
                    r_brack_token: R_BRACK@41..43 "]" [] [Whitespace(" ")],
                },
                operator_token: EQ@43..45 "=" [] [Whitespace(" ")],
                right: JsIdentifierExpression {
                    name: JsReferenceIdentifier {
                        value_token: IDENT@45..46 "h" [] [],
                    },
                },
            },
            semicolon_token: SEMICOLON@46..47 ";" [] [],
        },
        JsExpressionStatement {
            expression: JsAssignmentExpression {
                left: JsComputedMemberAssignment {
                    object: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@47..54 "using" [Newline("\n")] [Whitespace(" ")],
                        },
                    },
                    l_brack_token: L_BRACK@54..55 "[" [] [],
                    member: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@55..56 "j" [] [],
                        },
                    },
                    r_brack_token: R_BRACK@56..57 "]" [] [],
                },
                operator_token: EQ@57..60 "=" [Newline("\n")] [Whitespace(" ")],
                right: JsIdentifierExpression {
                    name: JsReferenceIdentifier {
                        value_token: IDENT@60..61 "k" [] [],
                    },
                },
            },
            semicolon_token: SEMICOLON@61..62 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: AWAIT_KW@62..69 "await" [Newline("\n")] [Whitespace(" ")],
                kind: USING_KW@69..75 "using" [] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@75..77 "l" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@77..79 "=" [] [Whitespace(" ")],
                            expression: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@79..80 "m" [] [],
                                },
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@80..81 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: AWAIT_KW@81..87 "await" [Newline("\n")] [],
                kind: USING_KW@87..94 "using" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@94..96 "p" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@96..98 "=" [] [Whitespace(" ")],
                            expression: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@98..99 "q" [] [],
                                },
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@99..100 ";" [] [],
        },
        JsExpressionStatement {
            expression: JsAwaitExpression {
                await_token: AWAIT_KW@100..107 "await" [Newline("\n")] [Whitespace(" ")],
                argument: JsComputedMemberExpression {
                    object: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@107..112 "using" [] [],
                        },
                    },
                    optional_chain_token: missing (optional),
                    l_brack_token: L_BRACK@112..113 "[" [] [],
                    member: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@113..114 "r" [] [],
                        },
                    },
                    r_brack_token: R_BRACK@114..115 "]" [] [],
                },
            },
            semicolon_token: SEMICOLON@115..116 ";" [] [],
        },
        JsExpressionStatement {
            expression: JsAwaitExpression {
                await_token: AWAIT_KW@116..123 "await" [Newline("\n")] [Whitespace(" ")],
                argument: JsCallExpression {
                    callee: JsIdentifierExpression {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@123..129 "using" [] [Whitespace(" ")],
                        },
                    },
                    optional_chain_token: missing (optional),
                    type_arguments: missing (optional),
                    arguments: JsCallArguments {
                        l_paren_token: L_PAREN@129..130 "(" [] [],
                        args: JsCallArgumentList [
                            JsAssignmentExpression {
                                left: JsArrayAssignmentPattern {
                                    l_brack_token: L_BRACK@130..131 "[" [] [],
                                    elements: JsArrayAssignmentPatternElementList [
                                        JsArrayAssignmentPatternElement {
                                            pattern: JsIdentifierAssignment {
                                                name_token: IDENT@131..132 "s" [] [],
                                            },
                                            init: missing (optional),
                                        },
                                    ],
                                    r_brack_token: R_BRACK@132..134 "]" [] [Whitespace(" ")],
                                },
                                operator_token: EQ@134..136 "=" [] [Whitespace(" ")],
                                right: JsIdentifierExpression {
                                    name: JsReferenceIdentifier {
                                        value_token: IDENT@136..137 "t" [] [],
                                    },
                                },
                            },
                        ],
                        r_paren_token: R_PAREN@137..138 ")" [] [],
                    },
                },
            },
            semicolon_token: SEMICOLON@138..139 ";" [] [],
        },
        JsExpressionStatement {
            expression: JsAwaitExpression {
                await_token: AWAIT_KW@139..146 "await" [Newline("\n")] [Whitespace(" ")],
                argument: JsParenthesizedExpression {
                    l_paren_token: L_PAREN@146..147 "(" [] [],
                    expression: JsAssignmentExpression {
                        left: JsComputedMemberAssignment {
                            object: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@147..153 "using" [] [Whitespace(" ")],
                                },
                            },
                            l_brack_token: L_BRACK@153..154 "[" [] [],
                            member: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@154..155 "u" [] [],
                                },
                            },
                            r_brack_token: R_BRACK@155..157 "]" [] [Whitespace(" ")],
                        },
                        operator_token: EQ@157..159 "=" [] [Whitespace(" ")],
                        right: JsIdentifierExpression {
                            name: JsReferenceIdentifier {
                                value_token: IDENT@159..160 "v" [] [],
                            },
                        },
                    },
                    r_paren_token: R_PAREN@160..161 ")" [] [],
                },
            },
            semicolon_token: SEMICOLON@161..162 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: USING_KW@162..169 "using" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@169..171 "w" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@171..173 "=" [] [Whitespace(" ")],
                            expression: JsObjectExpression {
                                l_curly_token: L_CURLY@173..174 "{" [] [],
                                members: JsObjectMemberList [],
                                r_curly_token: R_CURLY@174..175 "}" [] [],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@175..176 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: USING_KW@176..183 "using" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@183..185 "x" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@185..187 "=" [] [Whitespace(" ")],
                            expression: JsNullLiteralExpression {
                                value_token: NULL_KW@187..191 "null" [] [],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@191..192 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: USING_KW@192..199 "using" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@199..201 "y" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@201..203 "=" [] [Whitespace(" ")],
                            expression: JsIdentifierExpression {
                                name: JsReferenceIdentifier {
                                    value_token: IDENT@203..212 "undefined" [] [],
                                },
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@212..213 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: USING_KW@213..220 "using" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@220..222 "z" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@222..224 "=" [] [Whitespace(" ")],
                            expression: JsParenthesizedExpression {
                                l_paren_token: L_PAREN@224..225 "(" [] [],
                                expression: JsSequenceExpression {
                                    left: JsIdentifierExpression {
                                        name: JsReferenceIdentifier {
                                            value_token: IDENT@225..228 "foo" [] [],
                                        },
                                    },
                                    comma_token: COMMA@228..230 "," [] [Whitespace(" ")],
                                    right: JsIdentifierExpression {
                                        name: JsReferenceIdentifier {
                                            value_token: IDENT@230..233 "bar" [] [],
                                        },
                                    },
                                },
                                r_paren_token: R_PAREN@233..234 ")" [] [],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@234..235 ";" [] [],
        },
    ],
    eof_token: EOF@235..236 "" [Newline("\n")] [],
}

0: JS_MODULE@0..236
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..235
    0: JS_VARIABLE_STATEMENT@0..12
      0: JS_VARIABLE_DECLARATION@0..11
        0: (empty)
        1: USING_KW@0..6 "using" [] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@6..11
          0: JS_VARIABLE_DECLARATOR@6..11
            0: JS_IDENTIFIER_BINDING@6..8
              0: IDENT@6..8 "a" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@8..11
              0: EQ@8..10 "=" [] [Whitespace(" ")]
              1: JS_IDENTIFIER_EXPRESSION@10..11
                0: JS_REFERENCE_IDENTIFIER@10..11
                  0: IDENT@10..11 "b" [] []
      1: SEMICOLON@11..12 ";" [] []
    1: JS_VARIABLE_STATEMENT@12..32
      0: JS_VARIABLE_DECLARATION@12..31
        0: (empty)
        1: USING_KW@12..19 "using" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@19..31
          0: JS_VARIABLE_DECLARATOR@19..24
            0: JS_IDENTIFIER_BINDING@19..21
              0: IDENT@19..21 "c" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@21..24
              0: EQ@21..23 "=" [] [Whitespace(" ")]
              1: JS_IDENTIFIER_EXPRESSION@23..24
                0: JS_REFERENCE_IDENTIFIER@23..24
                  0: IDENT@23..24 "d" [] []
          1: COMMA@24..26 "," [] [Whitespace(" ")]
          2: JS_VARIABLE_DECLARATOR@26..31
            0: JS_IDENTIFIER_BINDING@26..28
              0: IDENT@26..28 "e" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@28..31
              0: EQ@28..30 "=" [] [Whitespace(" ")]
              1: JS_IDENTIFIER_EXPRESSION@30..31
                0: JS_REFERENCE_IDENTIFIER@30..31
                  0: IDENT@30..31 "_" [] []
      1: SEMICOLON@31..32 ";" [] []
    2: JS_EXPRESSION_STATEMENT@32..47
      0: JS_ASSIGNMENT_EXPRESSION@32..46
        0: JS_COMPUTED_MEMBER_ASSIGNMENT@32..43
          0: JS_IDENTIFIER_EXPRESSION@32..39
            0: JS_REFERENCE_IDENTIFIER@32..39
              0: IDENT@32..39 "using" [Newline("\n")] [Whitespace(" ")]
          1: L_BRACK@39..40 "[" [] []
          2: JS_IDENTIFIER_EXPRESSION@40..41
            0: JS_REFERENCE_IDENTIFIER@40..41
              0: IDENT@40..41 "g" [] []
          3: R_BRACK@41..43 "]" [] [Whitespace(" ")]
        1: EQ@43..45 "=" [] [Whitespace(" ")]
        2: JS_IDENTIFIER_EXPRESSION@45..46
          0: JS_REFERENCE_IDENTIFIER@45..46
            0: IDENT@45..46 "h" [] []
      1: SEMICOLON@46..47 ";" [] []
    3: JS_EXPRESSION_STATEMENT@47..62
      0: JS_ASSIGNMENT_EXPRESSION@47..61
        0: JS_COMPUTED_MEMBER_ASSIGNMENT@47..57
          0: JS_IDENTIFIER_EXPRESSION@47..54
            0: JS_REFERENCE_IDENTIFIER@47..54
              0: IDENT@47..54 "using" [Newline("\n")] [Whitespace(" ")]
          1: L_BRACK@54..55 "[" [] []
          2: JS_IDENTIFIER_EXPRESSION@55..56
            0: JS_REFERENCE_IDENTIFIER@55..56
              0: IDENT@55..56 "j" [] []
          3: R_BRACK@56..57 "]" [] []
        1: EQ@57..60 "=" [Newline("\n")] [Whitespace(" ")]
        2: JS_IDENTIFIER_EXPRESSION@60..61
          0: JS_REFERENCE_IDENTIFIER@60..61
            0: IDENT@60..61 "k" [] []
      1: SEMICOLON@61..62 ";" [] []
    4: JS_VARIABLE_STATEMENT@62..81
      0: JS_VARIABLE_DECLARATION@62..80
        0: AWAIT_KW@62..69 "await" [Newline("\n")] [Whitespace(" ")]
        1: USING_KW@69..75 "using" [] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@75..80
          0: JS_VARIABLE_DECLARATOR@75..80
            0: JS_IDENTIFIER_BINDING@75..77
              0: IDENT@75..77 "l" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@77..80
              0: EQ@77..79 "=" [] [Whitespace(" ")]
              1: JS_IDENTIFIER_EXPRESSION@79..80
                0: JS_REFERENCE_IDENTIFIER@79..80
                  0: IDENT@79..80 "m" [] []
      1: SEMICOLON@80..81 ";" [] []
    5: JS_VARIABLE_STATEMENT@81..100
      0: JS_VARIABLE_DECLARATION@81..99
        0: AWAIT_KW@81..87 "await" [Newline("\n")] []
        1: USING_KW@87..94 "using" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@94..99
          0: JS_VARIABLE_DECLARATOR@94..99
            0: JS_IDENTIFIER_BINDING@94..96
              0: IDENT@94..96 "p" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@96..99
              0: EQ@96..98 "=" [] [Whitespace(" ")]
              1: JS_IDENTIFIER_EXPRESSION@98..99
                0: JS_REFERENCE_IDENTIFIER@98..99
                  0: IDENT@98..99 "q" [] []
      1: SEMICOLON@99..100 ";" [] []
    6: JS_EXPRESSION_STATEMENT@100..116
      0: JS_AWAIT_EXPRESSION@100..115
        0: AWAIT_KW@100..107 "await" [Newline("\n")] [Whitespace(" ")]
        1: JS_COMPUTED_MEMBER_EXPRESSION@107..115
          0: JS_IDENTIFIER_EXPRESSION@107..112
            0: JS_REFERENCE_IDENTIFIER@107..112
              0: IDENT@107..112 "using" [] []
          1: (empty)
          2: L_BRACK@112..113 "[" [] []
          3: JS_IDENTIFIER_EXPRESSION@113..114
            0: JS_REFERENCE_IDENTIFIER@113..114
              0: IDENT@113..114 "r" [] []
          4: R_BRACK@114..115 "]" [] []
      1: SEMICOLON@115..116 ";" [] []
    7: JS_EXPRESSION_STATEMENT@116..139
      0: JS_AWAIT_EXPRESSION@116..138
        0: AWAIT_KW@116..123 "await" [Newline("\n")] [Whitespace(" ")]
        1: JS_CALL_EXPRESSION@123..138
          0: JS_IDENTIFIER_EXPRESSION@123..129
            0: JS_REFERENCE_IDENTIFIER@123..129
              0: IDENT@123..129 "using" [] [Whitespace(" ")]
          1: (empty)
          2: (empty)
          3: JS_CALL_ARGUMENTS@129..138
            0: L_PAREN@129..130 "(" [] []
            1: JS_CALL_ARGUMENT_LIST@130..137
              0: JS_ASSIGNMENT_EXPRESSION@130..137
                0: JS_ARRAY_ASSIGNMENT_PATTERN@130..134
                  0: L_BRACK@130..131 "[" [] []
                  1: JS_ARRAY_ASSIGNMENT_PATTERN_ELEMENT_LIST@131..132
                    0: JS_ARRAY_ASSIGNMENT_PATTERN_ELEMENT@131..132
                      0: JS_IDENTIFIER_ASSIGNMENT@131..132
                        0: IDENT@131..132 "s" [] []
                      1: (empty)
                  2: R_BRACK@132..134 "]" [] [Whitespace(" ")]
                1: EQ@134..136 "=" [] [Whitespace(" ")]
                2: JS_IDENTIFIER_EXPRESSION@136..137
                  0: JS_REFERENCE_IDENTIFIER@136..137
                    0: IDENT@136..137 "t" [] []
            2: R_PAREN@137..138 ")" [] []
      1: SEMICOLON@138..139 ";" [] []
    8: JS_EXPRESSION_STATEMENT@139..162
      0: JS_AWAIT_EXPRESSION@139..161
        0: AWAIT_KW@139..146 "await" [Newline("\n")] [Whitespace(" ")]
        1: JS_PARENTHESIZED_EXPRESSION@146..161
          0: L_PAREN@146..147 "(" [] []
          1: JS_ASSIGNMENT_EXPRESSION@147..160
            0: JS_COMPUTED_MEMBER_ASSIGNMENT@147..157
              0: JS_IDENTIFIER_EXPRESSION@147..153
                0: JS_REFERENCE_IDENTIFIER@147..153
                  0: IDENT@147..153 "using" [] [Whitespace(" ")]
              1: L_BRACK@153..154 "[" [] []
              2: JS_IDENTIFIER_EXPRESSION@154..155
                0: JS_REFERENCE_IDENTIFIER@154..155
                  0: IDENT@154..155 "u" [] []
              3: R_BRACK@155..157 "]" [] [Whitespace(" ")]
            1: EQ@157..159 "=" [] [Whitespace(" ")]
            2: JS_IDENTIFIER_EXPRESSION@159..160
              0: JS_REFERENCE_IDENTIFIER@159..160
                0: IDENT@159..160 "v" [] []
          2: R_PAREN@160..161 ")" [] []
      1: SEMICOLON@161..162 ";" [] []
    9: JS_VARIABLE_STATEMENT@162..176
      0: JS_VARIABLE_DECLARATION@162..175
        0: (empty)
        1: USING_KW@162..169 "using" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@169..175
          0: JS_VARIABLE_DECLARATOR@169..175
            0: JS_IDENTIFIER_BINDING@169..171
              0: IDENT@169..171 "w" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@171..175
              0: EQ@171..173 "=" [] [Whitespace(" ")]
              1: JS_OBJECT_EXPRESSION@173..175
                0: L_CURLY@173..174 "{" [] []
                1: JS_OBJECT_MEMBER_LIST@174..174
                2: R_CURLY@174..175 "}" [] []
      1: SEMICOLON@175..176 ";" [] []
    10: JS_VARIABLE_STATEMENT@176..192
      0: JS_VARIABLE_DECLARATION@176..191
        0: (empty)
        1: USING_KW@176..183 "using" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@183..191
          0: JS_VARIABLE_DECLARATOR@183..191
            0: JS_IDENTIFIER_BINDING@183..185
              0: IDENT@183..185 "x" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@185..191
              0: EQ@185..187 "=" [] [Whitespace(" ")]
              1: JS_NULL_LITERAL_EXPRESSION@187..191
                0: NULL_KW@187..191 "null" [] []
      1: SEMICOLON@191..192 ";" [] []
    11: JS_VARIABLE_STATEMENT@192..213
      0: JS_VARIABLE_DECLARATION@192..212
        0: (empty)
        1: USING_KW@192..199 "using" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@199..212
          0: JS_VARIABLE_DECLARATOR@199..212
            0: JS_IDENTIFIER_BINDING@199..201
              0: IDENT@199..201 "y" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@201..212
              0: EQ@201..203 "=" [] [Whitespace(" ")]
              1: JS_IDENTIFIER_EXPRESSION@203..212
                0: JS_REFERENCE_IDENTIFIER@203..212
                  0: IDENT@203..212 "undefined" [] []
      1: SEMICOLON@212..213 ";" [] []
    12: JS_VARIABLE_STATEMENT@213..235
      0: JS_VARIABLE_DECLARATION@213..234
        0: (empty)
        1: USING_KW@213..220 "using" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@220..234
          0: JS_VARIABLE_DECLARATOR@220..234
            0: JS_IDENTIFIER_BINDING@220..222
              0: IDENT@220..222 "z" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@222..234
              0: EQ@222..224 "=" [] [Whitespace(" ")]
              1: JS_PARENTHESIZED_EXPRESSION@224..234
                0: L_PAREN@224..225 "(" [] []
                1: JS_SEQUENCE_EXPRESSION@225..233
                  0: JS_IDENTIFIER_EXPRESSION@225..228
                    0: JS_REFERENCE_IDENTIFIER@225..228
                      0: IDENT@225..228 "foo" [] []
                  1: COMMA@228..230 "," [] [Whitespace(" ")]
                  2: JS_IDENTIFIER_EXPRESSION@230..233
                    0: JS_REFERENCE_IDENTIFIER@230..233
                      0: IDENT@230..233 "bar" [] []
                2: R_PAREN@233..234 ")" [] []
      1: SEMICOLON@234..235 ";" [] []
  4: EOF@235..236 "" [Newline("\n")] []