@NotNull
  @Override
  protected VirtualFileSet createFilesSet() {
    if (myType == PACKAGE) {
      VirtualFileSet fileSet = VfsUtilCore.createCompactVirtualFileSet();
      accept(createFileSearcher(fileSet));
      fileSet.freeze();
      return fileSet;
    }
    return super.createFilesSet();
  }
@NotNull
  @Override
  protected VirtualFileSet createFilesSet()