/**
  * Set Quotation Line discount
  * @param  mixed $QuotationLineHandle
  * @param  float $discount
  * @return boolean
  */
 public function discount($QuotationLineHandle, $discount)
 {
     $this->client->QuotationLine_SetDiscountAsPercent(array('quotationLineHandle' => $QuotationLineHandle, 'value' => $discount));
     return true;
 }