docs: public List<MtasTokenString> getObjectsByParentId(String field, int docId,
        int position) throws IOException {
      IndexDoc doc = getDoc(field, docId);
      IndexInput inIndexObjectParent = indexInputList.get("indexObjectParent");
      ArrayList<MtasTreeHit<?>> hits = CodecSearchTree.searchMtasTree(position,
          inIndexObjectParent, doc.fpIndexObjectParent,
          doc.smallestObjectFilepointer);
      return getObjects(hits);
    }