{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"match"}]}
        match tcx.hir_node_by_def_id(impl_m_def_id.expect_local()).fn_decl().unwrap().output {
    let (span, impl_return_span, pre, post) =
            hir::FnRetTy::DefaultReturn(span) => (tcx.def_span(impl_m_def_id), span, "-> ", " "),