code: public void setUnmatchedFaces(java.util.Collection<ComparedFace> unmatchedFaces) {
          if (unmatchedFaces == null) {
              this.unmatchedFaces = null;
              return;
          }
  
          this.unmatchedFaces = new java.util.ArrayList<ComparedFace>(unmatchedFaces);
      }
docs: <p>
  An array of faces in the target image that did not match the source image face.
  </p>
  
  @param unmatchedFaces
  An array of faces in the target image that did not match the source image face.