public function findRoot(ConnectionInterface $con = null)
    {
        return $this
            ->addUsingAlias(ChildCategory::LEFT_COL, 1, Criteria::EQUAL)
            ->findOne($con);
    }
public function findRoot(ConnectionInterface $con = null)
    {
        return $this
            ->addUsingAlias(ChildCategory::LEFT_COL, 1, Criteria::EQUAL)
            ->findOne($con);
    }
public function findRoot ( ConnectionInterface $ con = null ) { return $ this -> addUsingAlias ( ChildCategory :: LEFT_COL , 1 , Criteria :: EQUAL ) -> findOne ( $ con ) ; }
Returns the root node for the tree

@param      ConnectionInterface $con    Connection to use.

@return     ChildCategory The tree root object
Returns the root node for the tree