original_string: public static function get_user_contexts_with_script(userlist $userlist, \context $context, string $script,
                                                           int $instance = null) {
          if (!$context instanceof \context_user) {
              return;
          }
  
          $params = [
              'userid' => $context->instanceid,
              'script' => $script
          ];
  
          $whereinstance = '';
  
          if (!empty($instance)) {
              $params['instance'] = $instance;
              $whereinstance = ' AND k.instance = :instance';
          }
  
          $sql = "SELECT k.userid
                    FROM {user_private_key} k
                   WHERE k.script = :script
                         AND k.userid = :userid
                         {$whereinstance}";
  
          $userlist->add_from_sql('userid', $sql, $params);
      }
code: public static function get_user_contexts_with_script(userlist $userlist, \context $context, string $script,
                                                           int $instance = null) {
          if (!$context instanceof \context_user) {
              return;
          }
  
          $params = [
              'userid' => $context->instanceid,
              'script' => $script
          ];
  
          $whereinstance = '';
  
          if (!empty($instance)) {
              $params['instance'] = $instance;
              $whereinstance = ' AND k.instance = :instance';
          }
  
          $sql = "SELECT k.userid
                    FROM {user_private_key} k
                   WHERE k.script = :script
                         AND k.userid = :userid
                         {$whereinstance}";
  
          $userlist->add_from_sql('userid', $sql, $params);
      }
code_tokens: public static function get_user_contexts_with_script ( userlist $ userlist , \ context $ context , string $ script , int $ instance = null ) { if ( ! $ context instanceof \ context_user ) { return ; } $ params = [ 'userid' => $ context -> instanceid , 'script' => $ script ] ; $ whereinstance = '' ; if ( ! empty ( $ instance ) ) { $ params [ 'instance' ] = $ instance ; $ whereinstance = ' AND k.instance = :instance' ; } $ sql = "SELECT k.userid
                    FROM {user_private_key} k
                   WHERE k.script = :script
                         AND k.userid = :userid
                         {$whereinstance}" ; $ userlist -> add_from_sql ( 'userid' , $ sql , $ params ) ; }
docstring: Get the list of users within a specific context for this system.
  
  @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
  @param context $context The context.
  @param string $script The unique target identifier.
  @param int $instance The instance ID.
docstring_tokens: Get the list of users within a specific context for this system .