code: public PersonMatch withFaceMatches(FaceMatch... faceMatches) {
          if (this.faceMatches == null) {
              setFaceMatches(new java.util.ArrayList<FaceMatch>(faceMatches.length));
          }
          for (FaceMatch ele : faceMatches) {
              this.faceMatches.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the faces in the input collection that match the face of a person in the video.
  </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
  Information about the faces in the input collection that match the face of a person in the video.
  @return Returns a reference to this object so that method calls can be chained together.