def update_child_visibility
      return if meta_visible == meta_visible_was
      post_fields.map { |pf| pf.update(meta_visible: meta_visible) }
    end
def update_child_visibility
      return if meta_visible == meta_visible_was
      post_fields.map { |pf| pf.update(meta_visible: meta_visible) }
    end
This functions update all post fields child visibility with the current
 post field visibility.