protected function nextOperand()
    {
        if (isset($this->operands[$this->operandsCount])) {
            $operand = $this->operands[$this->operandsCount];
            if (!$operand->isMultiple()) {
                $this->operandsCount++;
            }
            return $operand;
        }

        return null;
    }
protected function nextOperand()
    {
        if (isset($this->operands[$this->operandsCount])) {
            $operand = $this->operands[$this->operandsCount];
            if (!$operand->isMultiple()) {
                $this->operandsCount++;
            }
            return $operand;
        }

        return null;
    }
protected function nextOperand ( ) { if ( isset ( $ this -> operands [ $ this -> operandsCount ] ) ) { $ operand = $ this -> operands [ $ this -> operandsCount ] ; if ( ! $ operand -> isMultiple ( ) ) { $ this -> operandsCount ++ ; } return $ operand ; } return null ; }
Get the next operand

@return Operand
Get the next operand