Derived::GetInitialValue(input_element_type, loc, rewriter);

    RankedTensorType output_type =
        mlir::dyn_cast<RankedTensorType>(op.getOutput().getType());
    if (!output_type) {
      return rewriter.notifyMatchFailure(op, "requires known rank");
    }

    Type index_element_type = output_type.getElementType();
    Value index_init_value =

	15, // 19: istio.workload.GatewayAddress.address:type_name -> istio.workload.NetworkAddress
	11, // 20: istio.workload.Workload.ServicesEntry.value:type_name -> istio.workload.PortList
	21, // [21:21] is the sub-list for method output_type
	21, // [21:21] is the sub-list for method input_type
	21, // [21:21] is the sub-list for extension type_name
	21, // [21:21] is the sub-list for extension extendee
	0,  // [0:21] is the sub-list for field type_name