source/php/Admin/AdminDisplayEvent.php
public function eventMeta($object, $box)
    {
        $id = $object->ID;
        $get_meta = get_post_meta($id);
        $meta = array();
        foreach ($get_meta as $key => $value) {
            if (is_array($value) && count($value) == 1) {
                $meta[$key] = \EventManagerIntegration\Shortcodes\SingleEvent::unserData($value[0]);
            } else {
                $meta[$key] = $value;
            }
        }

        $ret = '';

        // Information
        $event_info = \EventManagerIntegration\Shortcodes\SingleEvent::eventInfo(false, false, $meta);
        if (! empty($event_info)) {
            $ret .= '<ul><li><h3>' . __('Information', 'event-integration') . '</h3></li></ul>';
            $ret .= $event_info;
        }

        // Location
        $event_location = \EventManagerIntegration\Shortcodes\SingleEvent::eventLocation($meta);
        if (isset($meta['location'])) {
            $ret .= '<ul><li><h3>'.__('Location', 'event-integration').'</h3></li></ul>';
            $ret .= $event_location;
        }

        // Booking information
        $booking_info = \EventManagerIntegration\Shortcodes\SingleEvent::eventBooking($meta);
        if (strpos($booking_info, '<li>')) {
            $ret .= '<ul><li><h3>'.__('Booking', 'event-integration').'</h3></li></ul>';
            $ret .= $booking_info;
        }

        // Contact
        if (! empty($contact = \EventManagerIntegration\Shortcodes\SingleEvent::eventContact($meta))) {
            $ret .= '<ul><li><h3>'.__('Contact', 'event-integration').'</h3></li></ul>';
            $ret .= '<ul>' . $contact . '</ul>';
        }

        // Organizers
        $event_organizer = \EventManagerIntegration\Shortcodes\SingleEvent::eventOrganizer($meta);
        if (! empty($meta['organizers'])) {
            $ret .= '<ul><li><h3>'.__('Organizer', 'event-integration').'</h3></li></ul>';
            $ret .= $event_organizer;
        }

        // Social media and streaming links
        $link_keys = array('facebook', 'twitter', 'instagram', 'google_music', 'spotify', 'soundcloud', 'deezer', 'youtube', 'vimeo');
        $links_exist = (count(array_intersect_key(array_flip($link_keys), $meta)) > 0) ? true : false;
        $event_links = \EventManagerIntegration\Shortcodes\SingleEvent::eventLinks($meta);
        if ($links_exist) {
            $ret .= '<ul><li><h3>' . __('Links', 'event-integration') . '</h3></li></ul>';
            $ret .= $event_links;
        }

        $even_taxonomies = \EventManagerIntegration\Shortcodes\SingleEvent::eventTaxonomies($meta);
        $ret .= '<ul><li><h3>' . __('Taxonomies', 'event-integration') . '</h3></li></ul>';
        $ret .= $even_taxonomies;

        echo $ret;
    }
public function eventMeta($object, $box)
    {
        $id = $object->ID;
        $get_meta = get_post_meta($id);
        $meta = array();
        foreach ($get_meta as $key => $value) {
            if (is_array($value) && count($value) == 1) {
                $meta[$key] = \EventManagerIntegration\Shortcodes\SingleEvent::unserData($value[0]);
            } else {
                $meta[$key] = $value;
            }
        }

        $ret = '';

        // Information
        $event_info = \EventManagerIntegration\Shortcodes\SingleEvent::eventInfo(false, false, $meta);
        if (! empty($event_info)) {
            $ret .= '<ul><li><h3>' . __('Information', 'event-integration') . '</h3></li></ul>';
            $ret .= $event_info;
        }

        // Location
        $event_location = \EventManagerIntegration\Shortcodes\SingleEvent::eventLocation($meta);
        if (isset($meta['location'])) {
            $ret .= '<ul><li><h3>'.__('Location', 'event-integration').'</h3></li></ul>';
            $ret .= $event_location;
        }

        // Booking information
        $booking_info = \EventManagerIntegration\Shortcodes\SingleEvent::eventBooking($meta);
        if (strpos($booking_info, '<li>')) {
            $ret .= '<ul><li><h3>'.__('Booking', 'event-integration').'</h3></li></ul>';
            $ret .= $booking_info;
        }

        // Contact
        if (! empty($contact = \EventManagerIntegration\Shortcodes\SingleEvent::eventContact($meta))) {
            $ret .= '<ul><li><h3>'.__('Contact', 'event-integration').'</h3></li></ul>';
            $ret .= '<ul>' . $contact . '</ul>';
        }

        // Organizers
        $event_organizer = \EventManagerIntegration\Shortcodes\SingleEvent::eventOrganizer($meta);
        if (! empty($meta['organizers'])) {
            $ret .= '<ul><li><h3>'.__('Organizer', 'event-integration').'</h3></li></ul>';
            $ret .= $event_organizer;
        }

        // Social media and streaming links
        $link_keys = array('facebook', 'twitter', 'instagram', 'google_music', 'spotify', 'soundcloud', 'deezer', 'youtube', 'vimeo');
        $links_exist = (count(array_intersect_key(array_flip($link_keys), $meta)) > 0) ? true : false;
        $event_links = \EventManagerIntegration\Shortcodes\SingleEvent::eventLinks($meta);
        if ($links_exist) {
            $ret .= '<ul><li><h3>' . __('Links', 'event-integration') . '</h3></li></ul>';
            $ret .= $event_links;
        }

        $even_taxonomies = \EventManagerIntegration\Shortcodes\SingleEvent::eventTaxonomies($meta);
        $ret .= '<ul><li><h3>' . __('Taxonomies', 'event-integration') . '</h3></li></ul>';
        $ret .= $even_taxonomies;

        echo $ret;
    }
/*
Display event-meta-box