docs: public IndexFacesResult withUnindexedFaces(UnindexedFace... unindexedFaces) {
          if (this.unindexedFaces == null) {
              setUnindexedFaces(new java.util.ArrayList<UnindexedFace>(unindexedFaces.length));
          }
          for (UnindexedFace ele : unindexedFaces) {
              this.unindexedFaces.add(ele);
          }
          return this;
      }