code: public void setFaces(java.util.Collection<FaceDetection> faces) {
          if (faces == null) {
              this.faces = null;
              return;
          }
  
          this.faces = new java.util.ArrayList<FaceDetection>(faces);
      }
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>
  
  @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.