original_string: protected function getUserString()
      {
          $user = $this->core->auth()->user();
  
          if ( ! $user) return null;
  
          return $user->getUsername();
      }
code: protected function getUserString()
      {
          $user = $this->core->auth()->user();
  
          if ( ! $user) return null;
  
          return $user->getUsername();
      }
code_tokens: protected function getUserString ( ) { $ user = $ this -> core -> auth ( ) -> user ( ) ; if ( ! $ user ) return null ; return $ user -> getUsername ( ) ; }
docstring: Returns user name for currently logged in user, if known.
  
  @return null|string
docstring_tokens: Returns user name for currently logged in user if known .