original_string: public function add($id)
      {
          if (isset($this->ids[$id])) {
              return false;
          }
          return $this->ids[$id] = true;
      }
code: public function add($id)
      {
          if (isset($this->ids[$id])) {
              return false;
          }
          return $this->ids[$id] = true;
      }
code_tokens: public function add ( $ id ) { if ( isset ( $ this -> ids [ $ id ] ) ) { return false ; } return $ this -> ids [ $ id ] = true ; }
docstring: Add an ID to the lookup table.
  @param string $id ID to be added.
  @return bool status, true if success, false if there's a dupe
docstring_tokens: Add an ID to the lookup table .