{"ast_node_type":"function","tokens":[{"end":83,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn hir_fn_sig_by_hir_id(self, hir_id: HirId) -> Option<&'tcx FnSig<'tcx>> {
    #[track_caller]
        self.hir_node(hir_id).fn_sig()