public function admin_init()
 {
     if (!$this->is_tgmpa_page()) {
         return;
     }
     if (isset($_REQUEST['tab']) && 'plugin-information' == $_REQUEST['tab']) {
         require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
         wp_enqueue_style('plugin-install');
         global $tab, $body_id;
         $body_id = $tab = 'plugin-information';
         install_plugin_information();
         exit;
     }
 }

 /**
  * Handles calls to show plugin information via links in the notices.
  *
  * We get the links in the admin notices to point to the TGMPA page, rather
  * than the typical plugin-install.php file, so we can prepare everything
  * beforehand.
  *
  * WP does not make it easy to show the plugin information in the thickbox -
  * here we have to require a file that includes a function that does the
  * main work of displaying it, enqueue some styles, set up some globals and
  * finally call that function before exiting.
  *
  * Down right easy once you know how...
  *
  * Returns early if not the TGMPA page.
  *
  * @since 2.1.0
  *
  * @global string $tab Used as iframe div class names, helps with styling
  * @global string $body_id Used as the iframe body ID, helps with styling
  *
  * @return null Returns early if not the TGMPA page.
  */
 public function admin_init()
 {
     if (!$this->is_tgmpa_page()) {
         return;
     }
     if (isset($_REQUEST['tab']) && 'plugin-information' === $_REQUEST['tab']) {
         // Needed for install_plugin_information().
         require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
         wp_enqueue_style('plugin-install');
         global $tab, $body_id;
         $body_id = 'plugin-information';
         // @codingStandardsIgnoreStart
         $tab = 'plugin-information';
         // @codingStandardsIgnoreEnd
         install_plugin_information();
         exit;
     }
 }

 /**
  * maybe show the plugin changelog from update info
  */
 public function maybeShowChangelog()
 {
     if (!empty($_REQUEST['em_import_export_changelog']) && !empty($_REQUEST['plugin']) && !empty($_REQUEST['slug'])) {
         if (!current_user_can('update_plugins')) {
             wp_die(__('You do not have sufficient permissions to update plugins for this site.'), __('Error'), array('response' => 403));
         }
         global $tab, $body_id;
         $body_id = $tab = 'plugin-information';
         $_REQUEST['section'] = 'changelog';
         require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
         wp_enqueue_style('plugin-install');
         wp_enqueue_script('plugin-install');
         set_current_screen();
         install_plugin_information();
         exit;
     }
 }

 /**
  * Handles calls to show plugin information via links in the notices.
  *
  * We get the links in the admin notices to point to the TGMPA page, rather
  * than the typical plugin-install.php file, so we can prepare everything
  * beforehand.
  *
  * WP doesn't make it easy to show the plugin information in the thickbox -
  * here we have to require a file that includes a function that does the
  * main work of displaying it, enqueue some styles, set up some globals and
  * finally call that function before exiting.
  *
  * Down right easy once you know how...
  *
  * @since 2.1.0
  *
  * @global string $tab Used as iframe div class names, helps with styling
  * @global string $body_id Used as the iframe body ID, helps with styling
  * @return null Returns early if not the TGMPA page.
  */
 public function admin_init()
 {
     if (!$this->is_tgmpa_page()) {
         return;
     }
     //probably not needed
     set_time_limit(-1);
     if (isset($_REQUEST['tab']) && 'plugin-information' === $_REQUEST['tab']) {
         require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
         // Need for install_plugin_information().
         wp_enqueue_style('plugin-install');
         global $tab, $body_id;
         $body_id = 'plugin-information';
         $tab = 'plugin-information';
         install_plugin_information();
         exit;
     }
 }