public MavenExecutionOptions.ChecksumPolicy getChecksumPolicy() {
    if (hasOption(CHECKSUM_WARNING_POLICY)) return MavenExecutionOptions.ChecksumPolicy.WARN;
    if (hasOption(CHECKSUM_FAILURE_POLICY)) return MavenExecutionOptions.ChecksumPolicy.FAIL;
    return null;
  }
public MavenExecutionOptions.ChecksumPolicy getChecksumPolicy()