@Override
  public KnownVersion[] getSerializationVersions() {
    return KNOWN_VERSIONS;
  }
Remove elements from the list that are not instances of CliFunctionResult and then sort the
results.

@param results The results to clean.
@return The cleaned results.
geode-core/src/main/java/org/apache/geode/management/internal/functions/CliFunctionResult.java