original_string: public function getFilter($filtername) {
          $filter = null;
          if (!is_null($this->filters) && isset($this->filters[$filtername])) {
              $filter = $this->filters[$filtername];
          }
          return $filter;
      }
code: public function getFilter($filtername) {
          $filter = null;
          if (!is_null($this->filters) && isset($this->filters[$filtername])) {
              $filter = $this->filters[$filtername];
          }
          return $filter;
      }
code_tokens: public function getFilter ( $ filtername ) { $ filter = null ; if ( ! is_null ( $ this -> filters ) && isset ( $ this -> filters [ $ filtername ] ) ) { $ filter = $ this -> filters [ $ filtername ] ; } return $ filter ; }
docstring: Return the filter or null.
  @param String $filtername
  @return Filter $filter.
docstring_tokens: Return the filter or null .