public @NotNull ToolbarDecorator setActionGroup(@NotNull ActionGroup actionGroup) {
    AnAction[] actions = actionGroup.getChildren(null);
    for (AnAction action : actions) {
      if (!(action instanceof Separator)) {
        addExtraAction(action);
      }
    }
    return this;
  }
public @NotNull ToolbarDecorator setActionGroup(@NotNull ActionGroup actionGroup)