protected function sortAssignments(array $assignments)
    {
        usort($assignments, function (StockAssignmentInterface $a1, StockAssignmentInterface $a2) {
            $u1 = $a1->getStockUnit();
            $u2 = $a2->getStockUnit();

            return $this->compareStockUnit($u1, $u2);
        });

        return $assignments;
    }
protected function sortAssignments(array $assignments)
    {
        usort($assignments, function (StockAssignmentInterface $a1, StockAssignmentInterface $a2) {
            $u1 = $a1->getStockUnit();
            $u2 = $a2->getStockUnit();

            return $this->compareStockUnit($u1, $u2);
        });

        return $assignments;
    }
protected function sortAssignments ( array $ assignments ) { usort ( $ assignments , function ( StockAssignmentInterface $ a1 , StockAssignmentInterface $ a2 ) { $ u1 = $ a1 -> getStockUnit ( ) ; $ u2 = $ a2 -> getStockUnit ( ) ; return $ this -> compareStockUnit ( $ u1 , $ u2 ) ; } ) ; return $ assignments ; }
Sorts assignments.

@param array $assignments

@return array
Sorts assignments .