syntax_data: {"ast_node_type":"function","tokens":[{"end":74,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn checked_add(self, tcx: TyCtxt<'tcx>, n: u128) -> (Self, bool) {
context_before:     }
context_after:         let (size, signed) = self.ty.int_size_and_signed(tcx);