public static StoredContent transientContent(VirtualFile f) {
    return new StoredContent(getFS().getCurrentContentId(f)) {
      @Override
      public void release() {
        throw new UnsupportedOperationException();
      }

      @Override
      public void write(DataOutput out) {
        throw new UnsupportedOperationException();
      }
    };
  }
public static StoredContent transientContent(VirtualFile f)