docs: public void setUnindexedFaces(java.util.Collection<UnindexedFace> unindexedFaces) {
          if (unindexedFaces == null) {
              this.unindexedFaces = null;
              return;
          }
  
          this.unindexedFaces = new java.util.ArrayList<UnindexedFace>(unindexedFaces);
      }