public VersionDifferences withPillarDifferences(PillarDifference... pillarDifferences) {
        if (this.pillarDifferences == null) {
            setPillarDifferences(new java.util.ArrayList<PillarDifference>(pillarDifferences.length));
        }
        for (PillarDifference ele : pillarDifferences) {
            this.pillarDifferences.add(ele);
        }
        return this;
    }
<p>
The differences between the base and latest versions of the lens.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setPillarDifferences(java.util.Collection)} or {@link #withPillarDifferences(java.util.Collection)} if
you want to override the existing values.
</p>

@param pillarDifferences
       The differences between the base and latest versions of the lens.
@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/VersionDifferences.java