WP_Customize_Background_Image_Setting

17final class WP_Customize_Background_Image_Setting extends WP_Customize_Setting {18 19	/**20	 * Unique string identifier for the setting.21	 *22	 * @since 3.4.023	 * @var string24	 */25	public $id = 'background_image_thumb';26 27	/**28	 * @since 3.4.029	 * @since 7.0.0 Return type updated from void to true for compatibility with base class.30	 *31	 * @param mixed $value The value to update. Not used.32	 * @return true Always returns true.33	 */34	public function update( $value ) {35		remove_theme_mod( 'background_image_thumb' );36		return true;37	}38}