public function setInactiveAll() {
		foreach ($this->getElements() as $element) {
			if ($element instanceof Element) {
				$element->setInactive();
			}
		}
		
		return $this;
	}
public function setInactiveAll() {
		foreach ($this->getElements() as $element) {
			if ($element instanceof Element) {
				$element->setInactive();
			}
		}
		
		return $this;
	}
public function setInactiveAll ( ) { foreach ( $ this -> getElements ( ) as $ element ) { if ( $ element instanceof Element ) { $ element -> setInactive ( ) ; } } return $ this ; }
Set all element to inactive

@return Navigation
Set all element to inactive