code: public CompareFacesResult withFaceMatches(CompareFacesMatch... faceMatches) {
          if (this.faceMatches == null) {
              setFaceMatches(new java.util.ArrayList<CompareFacesMatch>(faceMatches.length));
          }
          for (CompareFacesMatch ele : faceMatches) {
              this.faceMatches.add(ele);
          }
          return this;
      }
docs: <p>
  An array of faces in the target image that match the source image face. Each <code>CompareFacesMatch</code>
  object provides the bounding box, the confidence level that the bounding box contains a face, and the similarity
  score for the face in the bounding box and the face in the source image.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setFaceMatches(java.util.Collection)} or {@link #withFaceMatches(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param faceMatches
  An array of faces in the target image that match the source image face. Each
  <code>CompareFacesMatch</code> object provides the bounding box, the confidence level that the bounding
  box contains a face, and the similarity score for the face in the bounding box and the face in the source
  image.
  @return Returns a reference to this object so that method calls can be chained together.