{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"key:"}]}
    key: ty::PseudoCanonicalInput<'tcx, GlobalId<'tcx>>,
    tcx: TyCtxt<'tcx>,
) -> ::rustc_middle::mir::interpret::EvalToAllocationRawResult<'tcx> {