code: @Override
  	protected Union<T> translateToDataFlow(Operator<T> input1, Operator<T> input2) {
  		return new Union<T>(input1, input2, unionLocationName);
  	}
docs: Returns the BinaryNodeTranslation of the Union.
  
  @param input1 The first input of the union, as a common API operator.
  @param input2 The second input of the union, as a common API operator.
  @return The common API union operator.