code: void appendFailedModelParameters(MP params, Exception e) {
      assert params != null : "Model parameters should be always != null !";
      String[] rawParams = ArrayUtils.toString(getHyperValues(params));
      appendFailedModelParameters(params, rawParams, e.getMessage(), StringUtils.toString(e));
    }
docs: This method appends a new item to the list of failed model parameters.
  <p/>
  <p> The failed parameters object represents a point in hyper space which cannot be used for
  model building.</p>
  <p/>
  <p> Should be used only from <code>GridSearch</code> job.</p>
  
  @param params model parameters which caused model builder failure
  @params e  exception causing a failure