code: public RecognizeCelebritiesResult withUnrecognizedFaces(ComparedFace... unrecognizedFaces) {
          if (this.unrecognizedFaces == null) {
              setUnrecognizedFaces(new java.util.ArrayList<ComparedFace>(unrecognizedFaces.length));
          }
          for (ComparedFace ele : unrecognizedFaces) {
              this.unrecognizedFaces.add(ele);
          }
          return this;
      }
docs: <p>
  Details about each unrecognized face in the image.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUnrecognizedFaces(java.util.Collection)} or {@link #withUnrecognizedFaces(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param unrecognizedFaces
  Details about each unrecognized face in the image.
  @return Returns a reference to this object so that method calls can be chained together.