public StatusRuntimeException asRuntimeException() {
        if (statusRuntimeException == null) {
            statusRuntimeException = status.asRuntimeException(metadata);
        }
        return statusRuntimeException;
    }
A class that is used to cache {@link StatusRuntimeException} created from
{@link Status#asRuntimeException(Metadata)}.
grpc/src/main/java/com/linecorp/armeria/internal/common/grpc/StatusAndMetadata.java