public PillarDifference withQuestionDifferences(QuestionDifference... questionDifferences) {
        if (this.questionDifferences == null) {
            setQuestionDifferences(new java.util.ArrayList<QuestionDifference>(questionDifferences.length));
        }
        for (QuestionDifference ele : questionDifferences) {
            this.questionDifferences.add(ele);
        }
        return this;
    }
<p>
List of question differences.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setQuestionDifferences(java.util.Collection)} or {@link #withQuestionDifferences(java.util.Collection)}
if you want to override the existing values.
</p>

@param questionDifferences
       List of question differences.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-wellarchitected/src/main/java/com/amazonaws/services/wellarchitected/model/PillarDifference.java