original_string: private function handlerAdd($group)
      {
          if (!in_array($group, array_keys($this->handler))) {
              $this->handler[$group] = new SubDirectiveHandler($this->base, $group);
              return true;
          }
          return false;
      }
code: private function handlerAdd($group)
      {
          if (!in_array($group, array_keys($this->handler))) {
              $this->handler[$group] = new SubDirectiveHandler($this->base, $group);
              return true;
          }
          return false;
      }
code_tokens: private function handlerAdd ( $ group ) { if ( ! in_array ( $ group , array_keys ( $ this -> handler ) ) ) { $ this -> handler [ $ group ] = new SubDirectiveHandler ( $ this -> base , $ group ) ; return true ; } return false ; }
docstring: Add sub-directive handler
  
  @param string $group
  @return bool
docstring_tokens: Add sub - directive handler