public static OperatorIdentifier forUidHash(String uidHash) {
        Preconditions.checkNotNull(uidHash);
        return new OperatorIdentifier(new OperatorID(StringUtils.hexStringToByte(uidHash)), null);
    }
@Test
    void testForUidHash() {
        final OperatorID operatorId = new OperatorID();
        final String hash = operatorId.toHexString();

        assertThat(OperatorIdentifier.forUidHash(hash).getOperatorId()).isEqualTo(operatorId);
    }