public MavenExecutionOptions.FailureMode getFailureMode() {
    if (hasOption(FAIL_NEVER)) return MavenExecutionOptions.FailureMode.NEVER;
    if (hasOption(FAIL_AT_END)) return MavenExecutionOptions.FailureMode.AT_END;
    if (hasOption(FAIL_FAST)) return MavenExecutionOptions.FailureMode.FAST;
    return null;
  }
public MavenExecutionOptions.FailureMode getFailureMode()