Added Custom Label for Field Exclusing functionality

force-app/main/default/classes/OpportunityCloneService.cls

@@ -85,6 +85,11 @@ public with sharing class OpportunityCloneService {
     @AuraEnabled
     public static Id CloneOpportunityWithChildren(Id oppId, Map<String,String> newValues, 
             List<String> childRelationshipsToClone) {
+        String oppFieldListToClearString = Label.SmartCloneForceClearFieldList;
+        List<String> oppFieldListToClear = new List<String>();
+        if(!oppFieldListToClearString.contains('N/A')){
+            oppFieldListToClear = oppFieldListToClearString.split(';');
+        }
         //dynamic query in order to find the original opportunity.
         String originalOppQueryString = ObtainQueryStringForOppAndChildren(oppId, childRelationshipsToClone);
         System.debug(LoggingLevel.INFO,'\n\n*****\nQuery: ' + originalOppQueryString + '\n*****\n\n');
@@ -100,6 +105,10 @@ public with sharing class OpportunityCloneService {
         for(String fieldName:newValues.keySet()){
             clonedOpp.put(fieldName, CreateObjectValueFromString(fieldName,newValues.get(fieldName)));
         }
+        //clear out field values listed
+        for(String fieldName:oppFieldListToClear) {
+            clonedOpp.put(fieldName,null);
+        }
         //insert the new Opportunity
         try{
             insert clonedOpp;