{"ast_node_type":"function","tokens":[{"end":97,"kind":"keyword","start":0,"text":"///"}]}
    /// [RecoverReturnSign::OnlyFatArrow] allows for recovering only `fn foo() => u8` (recovering
    /// [RecoverReturnSign::Yes] allows for recovering `fn foo() => u8` and `fn foo(): u8`,
    /// colons can cause problems when parsing where clauses), and