meta field in search result

add_filter('ajax_wpqsf_reoutput', 'customize_output', '', 2);
function customize_output($results , $args){
	 // The Query
			$query = new WP_Query( $args );
		ob_start();	$results ='';
			// The Loop
		if ( $query->have_posts() ) {
			while ( $query->have_posts() ) {
				$query->the_post();
					echo get_post_meta($query->post->ID, 'your_meta_key', true );
					echo  '<li>'.get_permalink().'</li>';
			}
		 } else {
					 echo  'no post found';
				}
				/* Restore original Post Data */
				wp_reset_postdata();

		$results = ob_get_clean();
			return $results;
}