code: @CliObjectOption(description = "Delete files in target that don't exist on source.")
    public EmbeddedGobblinDistcp delete() {
      this.setConfiguration(RecursiveCopyableDataset.DELETE_KEY, Boolean.toString(true));
      return this;
    }
docs: Specifies that files in the target that don't exist in the source should be deleted. Equivalent to -delete
  option in Hadoop distcp.