private static Tag statusTag(String status) {
        // Normally, most gRPC requests complete with 0 status.
        if ("0".equals(status)) {
            return OK_TAG;
        }

        final Tag cached = STATUS_TAGS.get(status);
        if (cached != null) {
            return cached;
        }

        return Tag.of("grpc.status", status);
    }
Returns a newly created {@link GrpcMeterIdPrefixFunction} with the specified {@code name}.
grpc/src/main/java/com/linecorp/armeria/common/grpc/GrpcMeterIdPrefixFunction.java