@NotNull
    KeyFMap getUserMap(@NotNull VirtualFileSystemEntry file, int id) {
      Object o = objectFieldsArray.get(objectOffsetInSegment(id));
      if (!(o instanceof KeyFMap)) {
        throw reportDeadFileAccess(file);
      }
      return (KeyFMap)o;
    }
@NotNull
    KeyFMap getUserMap(@NotNull VirtualFileSystemEntry file, int id)