original_string: private function applyPrefix($key)
      {
          $prefix = (string) $this->client->getOption(Redis::OPT_PREFIX);
  
          return $prefix.$key;
      }
code: private function applyPrefix($key)
      {
          $prefix = (string) $this->client->getOption(Redis::OPT_PREFIX);
  
          return $prefix.$key;
      }
code_tokens: private function applyPrefix ( $ key ) { $ prefix = ( string ) $ this -> client -> getOption ( Redis :: OPT_PREFIX ) ; return $ prefix . $ key ; }
docstring: Apply prefix to the given key if necessary.
  
  @param  string  $key
  @return string
docstring_tokens: Apply prefix to the given key if necessary .