{"ast_node_type":"function","tokens":[{"end":66,"kind":"keyword","start":0,"text":"fn"}]}
    fn as_reference(&self) -> Option<(&Ty, Lifetime, Mutability)>;
    fn as_fn_def(&self, db: &dyn HirDatabase) -> Option<FunctionId>;
    fn as_raw_ptr(&self) -> Option<(&Ty, Mutability)>;