code: private boolean isPlaceHolder(String value) {
      return Strings.isNullOrEmpty(value) || value.equals(DatasetDescriptorConfigKeys.DATASET_DESCRIPTOR_CONFIG_ANY);
    }
docs: A placeholder configuration is one which is not defined or is set to {@link DatasetDescriptorConfigKeys#DATASET_DESCRIPTOR_CONFIG_ANY}.
  @param value to be examined for determining if it is a placeholder.
  @return true if the value is null or empty or equals {@link DatasetDescriptorConfigKeys#DATASET_DESCRIPTOR_CONFIG_ANY}.