{"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"BuiltIn(BuiltinFnLikeExpander),"}]}
    BuiltIn(BuiltinFnLikeExpander),
    /// Stuff like `line!` and `file!`.
    /// Built-in eagerly expanded fn-like macros (`include!`, `concat!`, etc.)