original_string: public function fieldset($label, callable $callback){
  		if ( $this->unbuffered() ){
  			trigger_error("Cannot use Form fieldsets in unbuffered mode", E_USER_ERROR);
  		}
  		$field = new FormFieldset($this->context, $label, $callback);
  		return $this->addField($field);
  	}
code: public function fieldset($label, callable $callback){
  		if ( $this->unbuffered() ){
  			trigger_error("Cannot use Form fieldsets in unbuffered mode", E_USER_ERROR);
  		}
  		$field = new FormFieldset($this->context, $label, $callback);
  		return $this->addField($field);
  	}
code_tokens: public function fieldset ( $ label , callable $ callback ) { if ( $ this -> unbuffered ( ) ) { trigger_error ( "Cannot use Form fieldsets in unbuffered mode" , E_USER_ERROR ) ; } $ field = new FormFieldset ( $ this -> context , $ label , $ callback ) ; return $ this -> addField ( $ field ) ; }
docstring: Form fieldset.
  
  @param $callback A new rendering context.
docstring_tokens: Form fieldset .