Null check operator removed from pharmacy_intervention_service.dart.

lib/screens/pharmacy_intervention/viewmodel/pharmacy_intervention_service.dart

@@ -78,7 +78,6 @@ class PharmacyInterventionService extends BaseService {
     }, onFailure: (String error, int statusCode) {
       hasError = true;
       DrAppToastMsg.showErrorToast(error);
-      super.error = super.error ?? "" + "\n" + error;
 
     }, body: {});
   return success;
@@ -97,8 +96,6 @@ class PharmacyInterventionService extends BaseService {
         }, onFailure: (String error, int statusCode) {
           hasError = true;
           DrAppToastMsg.showErrorToast(error);
-
-          super.error = super.error! + "\n" + error;
         }, body: {});
     return success;
   }
@@ -125,9 +122,6 @@ class PharmacyInterventionService extends BaseService {
     }, onFailure: (String error, int statusCode) {
       hasError = true;
       DrAppToastMsg.showErrorToast(error);
-
-      super.error = super.error! + "\n" + error;
-
     }, body: request);
     return result;
   }
@@ -139,11 +133,10 @@ class PharmacyInterventionService extends BaseService {
     var result = false;
      await baseAppClient.post(UPDATE_INFECTIOUS_STATUS,
         onSuccess: (dynamic response, int statusCode) {
-      result = response['IsAccepted'];
+      result = response['IsAccepted'] ?? false;
     }, onFailure: (String error, int statusCode) {
       hasError = true;
       DrAppToastMsg.showErrorToast(error);
-      super.error = super.error! + "\n" + error;
     }, body: request);
     return result;
   }
@@ -158,8 +151,6 @@ class PharmacyInterventionService extends BaseService {
         }, onFailure: (String error, int statusCode) {
           hasError = true;
           DrAppToastMsg.showErrorToast(error);
-
-          super.error = super.error! + "\n" + error;
         }, body: {});
     return station;
   }