docs: public DetectFacesResult withFaceDetails(FaceDetail... faceDetails) {
          if (this.faceDetails == null) {
              setFaceDetails(new java.util.ArrayList<FaceDetail>(faceDetails.length));
          }
          for (FaceDetail ele : faceDetails) {
              this.faceDetails.add(ele);
          }
          return this;
      }