Source

File: wp-includes/widgets/class-wp-widget-text.php

/**
	 * Add hooks for enqueueing assets when registering all widget instances of this widget class.
	 *
	 * @param integer $number Optional. The unique order number of this widget instance
	 *                        compared to other instances of the same class. Default -1.
	 */
	public function _register_one( $number = -1 ) {
		parent::_register_one( $number );
		if ( $this->registered ) {