@Nullable
  @Override
  public Object getData(@NotNull String dataId) {
    if (PlatformCoreDataKeys.BGT_DATA_PROVIDER.is(dataId)) {
      if (!(ContainerUtil.getFirstItem(mySelectedElements) instanceof ClassMemberWithElement member)) return null;
      return (DataProvider) slowId -> CommonDataKeys.PSI_ELEMENT.is(slowId) ? member.getElement() : null;
    }
    return null;
  }
@Nullable
  @Override
  public Object getData(@NotNull String dataId)