@CustomFieldSerializer(fieldName = "fieldCustomSerializable")
 public SFSDataWrapper customSerializeCustomField(Long value) {
   return new SFSDataWrapper(SFSDataType.INT, value.intValue());
 }
 @CustomFieldDeserializer(fieldName = "fieldCustomSerializable")
 public Long customDeserializeCustomField(SFSDataWrapper wrapper) {
   return Long.valueOf((Integer) wrapper.getObject());
 }