public function column_default( $item, $column_name ) {
		/**
		 * Filters the displayed columns in the terms list table.
		 *
		 * The dynamic portion of the hook name, `$this->screen->taxonomy`,
		 * refers to the slug of the current taxonomy.
		 *
		 * Possible hook names include:
		 *
		 *  - `manage_category_custom_column`
		 *  - `manage_post_tag_custom_column`
		 *
		 * @since 2.8.0
		 *
		 * @param string $string      Custom column output. Default empty.
		 * @param string $column_name Name of the column.
		 * @param int    $term_id     Term ID.
		 */
		return apply_filters( "manage_{$this->screen->taxonomy}_custom_column", '', $column_name, $item->term_id );
	}