public DeleteFacesResult withUnsuccessfulFaceDeletions(UnsuccessfulFaceDeletion... unsuccessfulFaceDeletions) {
        if (this.unsuccessfulFaceDeletions == null) {
            setUnsuccessfulFaceDeletions(new java.util.ArrayList<UnsuccessfulFaceDeletion>(unsuccessfulFaceDeletions.length));
        }
        for (UnsuccessfulFaceDeletion ele : unsuccessfulFaceDeletions) {
            this.unsuccessfulFaceDeletions.add(ele);
        }
        return this;
    }
<p>
An array of any faces that weren't deleted.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setUnsuccessfulFaceDeletions(java.util.Collection)} or
{@link #withUnsuccessfulFaceDeletions(java.util.Collection)} if you want to override the existing values.
</p>

@param unsuccessfulFaceDeletions
       An array of any faces that weren't deleted.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/DeleteFacesResult.java