{"ast_node_type":"variable","tokens":[{"end":24,"kind":"keyword","start":0,"text":"let"}]}
            let bounds =
            let opaque_ty = tcx.hir_node_by_def_id(opaque_def_id.expect_local()).expect_opaque_ty();
                associated_type_bounds(tcx, def_id, opaque_ty.bounds, opaque_ty.span, filter);