{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":".iter_identity_copied()"}]}
                    .iter_identity_copied()
                tcx.explicit_supertraits_containing_assoc_item((trait_ref.def_id(), assoc_name))
                    .map(|(clause, _)| clause.instantiate_supertrait(tcx, trait_ref))