public @Nullable DesignerEditorPanelFacade getActiveDesigner() {
    if (myProject.isDisposed()) return null;
    for (FileEditor editor : FileEditorManager.getInstance(myProject).getSelectedEditors()) {
      DesignerEditorPanelFacade designer = getDesigner(editor);
      if (designer != null) {
        return designer;
      }
    }

    return null;
  }
public @Nullable DesignerEditorPanelFacade getActiveDesigner()