original_string: protected function set_level($level) {
          $this->level = $level;
          foreach ($this->subtree as $tab) {
              $tab->set_level($level + 1);
          }
      }
code: protected function set_level($level) {
          $this->level = $level;
          foreach ($this->subtree as $tab) {
              $tab->set_level($level + 1);
          }
      }
code_tokens: protected function set_level ( $ level ) { $ this -> level = $ level ; foreach ( $ this -> subtree as $ tab ) { $ tab -> set_level ( $ level + 1 ) ; } }
docstring: Allows to mark each tab's level in the tree before rendering.
  
  @param int $level
docstring_tokens: Allows to mark each tab s level in the tree before rendering .