/**
  * Render a list of entries in the database.
  */
 public function listOfMembers($grouping)
 {
     $content = array();
     $content['add_existing_member'] = $this->formBuilder()->getForm('\\Drupal\\ea_grouping_members\\EAGroupingMembersAddForm', $grouping);
     $content['add_new_member'] = $this->formBuilder()->getForm('\\Drupal\\ea_people\\EAPeopleAddForm');
     $content['message'] = array('#markup' => $this->t('Generate a list of all members of the grouping.'));
     $header = array(array('data' => $this->t('Nickname'), 'field' => 'person.nickname'), array('data' => $this->t('First name'), 'field' => 'person.firstname'), array('data' => $this->t('Last names'), 'field' => 'person.lastnames'), $this->t('Edit'), $this->t('Membership'));
     // Only show members of this grouping.
     $filter = array('gid' => $grouping->gid);
     // Construct table rows.
     $rows = array();
     foreach ($entries = EAGroupingMembersStorage::loadSorted($header, $filter) as $member) {
         // Construct rows.
         $row = array();
         $row['data']['nickname'] = $member->nickname;
         $row['data']['firstname'] = $member->firstname;
         $row['data']['lastnames'] = $member->lastnames;
         // Format edit link.
         $edit_link_url = Url::fromRoute('ea_grouping_members.edit', array('grouping' => $grouping->gid, 'member' => $member->gmid));
         $edit_link = \Drupal::l($this->t('Edit'), $edit_link_url);
         $row['data']['edit_link'] = $edit_link;
         // Format cancel link.
         $cancel_link_url = Url::fromRoute('ea_grouping_members.cancel', array('grouping' => $grouping->gid, 'member' => $member->gmid));
         $cancel_link = \Drupal::l($this->t('Cancel'), $cancel_link_url);
         $row['data']['cancel_link'] = $cancel_link;
         // Add data to row.
         $rows[] = $row;
     }
     $content['table'] = array('#type' => 'table', '#header' => $header, '#rows' => $rows, '#empty' => t('No members added yet.'));
     $content['pager'] = array('#type' => 'pager');
     return $content;
 }