public static function get_icon_classes( $meta, $output = 'string' ) {
		$classes = array( '_mi' );

		if ( empty( $meta['hide_label'] ) ) {
			$classes[] = "_{$meta['position']}";
		}

		if ( 'string' === $output ) {
			$classes = implode( ' ', $classes );
		}

		return $classes;
	}