{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"&&"}]}
                        && let ty::Adt(kind, _) = ret_ty.kind()
                        .map(|c| self.resolve_vars_if_possible(c.borrow().expected_ty()))
                        && tcx.get_diagnostic_item(diagnostic_item) == Some(kind.did())