@Override
  public long getModificationCount() {
    // Depends on PersistentFS.getStructureModificationCount() - because com.intellij.openapi.vfs.impl.FilePartNode.update does.
    // Depends on its own modification counter - because we need to change both before and after VFS changes
    return super.getModificationCount() + PersistentFS.getInstance().getStructureModificationCount();
  }
@Override
  public long getModificationCount()