WP_Widget_Tag_Cloud::widget( array $args, array $instance )

	public function widget( $args, $instance ) {
		$current_taxonomy = $this->_get_current_taxonomy( $instance );

		if ( ! empty( $instance['title'] ) ) {
			$title = $instance['title'];
		} else {
			if ( 'post_tag' === $current_taxonomy ) {
				$title = __( 'Tags' );
			} else {
				$tax = get_taxonomy( $current_taxonomy );
				$title = $tax->labels->name;
			}
		}

		$show_count = ! empty( $instance['count'] );

		/**
		 * Filters the taxonomy used in the Tag Cloud widget.
		 *
		 * @since WP-2.8.0
		 * @since WP-3.0.0 Added taxonomy drop-down.
		 * @since WP-4.9.0 Added the `$instance` parameter.
		 *
		 * @see wp_tag_cloud()
		 *
		 * @param array $args     Args used for the tag cloud widget.
		 * @param array $instance Array of settings for the current widget.
		 */
		$tag_cloud = wp_tag_cloud( apply_filters( 'widget_tag_cloud_args', array(
			'taxonomy'   => $current_taxonomy,
			'echo'       => false,
			'show_count' => $show_count,
		), $instance ) );

		if ( empty( $tag_cloud ) ) {
			return;
		}

		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

		echo $args['before_widget'];
		if ( $title ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}

		echo '<div class="tagcloud">';

		echo $tag_cloud;

		echo "</div>\n";
		echo $args['after_widget'];
	}