{
"name": "filter-is-unread",
"description": "Built-in is: filter parses as a typed FilterKind variant.",
"spec": {
"source": "Gmail search operators",
"url": "https://support.google.com/mail/answer/7190",
"behavior": "is:unread matches messages that have not been read by the account."
},
"input": "is:unread",
"expected_ast": { "Filter": "unread" }
}