{
"$t": "ForStmt",
"body": {
"$t": "BlockStmt",
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},
"header": {
"InOf": {
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"lhs": {
"Declaration": {
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"declarators": [
{
"initializer": null,
"pattern": {
"$t": "IdentifierPattern",
"name": "s"
}
}
],
"mode": "Const"
}
},
"of": true,
"rhs": {
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"name": "expr"
}
}
}
}