private CIKey getOwnerMetaKey(final ReceiveDataConfig receiveDataConfig) {
        return CIKey.of(receiveDataConfig.getDataFeedKeyOwnerMetaKey());
    }
@return An optional containing a non-blank attribute value, else empty.
stroom-receive/stroom-receive-common/src/main/java/stroom/receive/common/DataFeedKeyServiceImpl.java