code: public GetFaceDetectionResult withFaces(FaceDetection... faces) {
          if (this.faces == null) {
              setFaces(new java.util.ArrayList<FaceDetection>(faces.length));
          }
          for (FaceDetection ele : faces) {
              this.faces.add(ele);
          }
          return this;
      }
docs: <p>
  An array of faces detected in the video. Each element contains a detected face's details and the time, in
  milliseconds from the start of the video, the face was detected.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setFaces(java.util.Collection)} or {@link #withFaces(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param faces
  An array of faces detected in the video. Each element contains a detected face's details and the time, in
  milliseconds from the start of the video, the face was detected.
  @return Returns a reference to this object so that method calls can be chained together.