{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":".and_then(|sig|"}]}
                .and_then(|sig| sig.inputs_and_output.split_last())
                .map(|def_id| self.tcx.fn_sig(def_id).skip_binder().skip_binder())
                .is_some_and(|(output, inputs)| {