WP_Customize_Manager::enqueue_control_scripts()

	public function enqueue_control_scripts() {
		foreach ( $this->controls as $control ) {
			$control->enqueue();
		}

		if ( ! is_multisite() && ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) || current_user_can( 'delete_themes' ) ) ) {
			wp_enqueue_script( 'updates' );
			wp_localize_script( 'updates', '_wpUpdatesItemCounts', array(
				'totals' => wp_get_update_data(),
			) );
		}
	}