{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"key:"}]}
        key: (DefId, rustc_span::Ident)
    query explicit_supertraits_containing_assoc_item(
    ) -> ty::EarlyBinder<'tcx, &'tcx [(ty::Clause<'tcx>, Span)]> {