{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"formal_and_expected_inputs:"}]}
        formal_and_expected_inputs: &IndexVec<ExpectedIdx, (Ty<'tcx>, Ty<'tcx>)>,
        matched_inputs: &IndexVec<ExpectedIdx, Option<ProvidedIdx>>,
        is_method: bool,