RawLayout.php
public function getHierarchy($id)
    {
        $path = $this->getProperty($id, self::PATH);

        return $this->hierarchy->get($path);
    }
public function getHierarchy($id)
    {
        $path = $this->getProperty($id, self::PATH);

        return $this->hierarchy->get($path);
    }
public function getHierarchy ( $ id ) { $ path = $ this -> getProperty ( $ id , self :: PATH ) ; return $ this -> hierarchy -> get ( $ path ) ; }
Returns the layout items hierarchy from the given path

@param string $id The id or alias of the layout item

@return array

@throws Exception\InvalidArgumentException if the id is empty
@throws Exception\ItemNotFoundException if the layout item does not exist
Returns the layout items hierarchy from the given path