{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"(trait_m,"}]}
    (trait_m, trait_sig): (ty::AssocItem, ty::FnSig<'tcx>),
    terr: TypeError<'tcx>,
    (impl_m, impl_sig): (ty::AssocItem, ty::FnSig<'tcx>),