public function getQuotationByProjectId($projectId = null)
 {
     try {
         $loggedInUserId = AppUtil::getLoggerInUserId();
         if ($loggedInUserId != null) {
             if ($projectId != null) {
                 $Quotation = Quotation::loadAllQuotationByProjId($projectId);
                 //echo json_encode($Quotation);
                 if ($Quotation !== null) {
                     echo AppUtil::getReturnStatus("Successful", $Quotation);
                 } else {
                     echo AppUtil::getReturnStatus("Unsuccessful", "Database Error Occurred");
                 }
             } else {
                 echo AppUtil::getReturnStatus("Unsuccessful", "Data not found");
             }
         }
     } catch (Exception $e) {
         echo AppUtil::getReturnStatus("Unsuccessful", $e->getMessage());
     }
 }