code: public function getParameters()
      {
          $parameters = $this->getUnfilteredParameters();
          foreach ($this->parameterFilters as $filter) {
              /** @var \Airbrake\Filter\FilterInterface $filter */
              $filter->filter($parameters);
          }
          return $parameters;
      }
docs: Get the combined server parameters. Note that these parameters will be
  filtered according to a black list of key names to ignore. If you wish to
  get the unfiltered results you should use the getUnfilteredParameters
  method instead.
  
  @return array