@Override
  public void computeChildren(@NotNull final XCompositeNode node) {
    if (node.isObsolete()) return;
    if (myReferrersLoader == null) {
      LOG.error("Failed to load Referring Objects. Frame accessor: " + getFrameAccessor());
      return;
    }
    myReferrersLoader.loadReferrers(this, new PyDebugCallback<>() {
      @Override
      public void ok(XValueChildrenList value) {
        if (!node.isObsolete()) {
          node.addChildren(value, true);
        }
      }

      @Override
      public void error(PyDebuggerException e) {
        if (!node.isObsolete()) {
          node.setErrorMessage("Unable to display children:" + e.getMessage());
        }
        LOG.warn(e);
      }
    });
  }
@Override
  public void computeChildren(@NotNull final XCompositeNode node)