Log.warn("in Structure.removeParamGroup().  ParameterGroup passed in is null");
Log.warn("in Array.removeParamGroup().  ParameterGroup passed in is null");
  public boolean removeParamGroup(ParameterGroup group) {    if (group == null) {      Log.warn("in Structure.removeParamGroup().  ParameterGroup passed in is null");      return false;    }    return paramGroupOwnedHash.remove(group);  }