gistfile1.js

function () {
         // Execute the "Copy" method on each selected record
         var grid = this;

         // check that we have a selection
         var selectedItems = grid.selection.getSelected();
         if (selectedItems.length < 1) {
             alert(grid.noSelectionsText);
             return;
         }
         var store = grid.store;
         grid.showMessage('Copying widgets...');

         var service = Sage.Utility.getSDataService('dynamic');
  
         // this is the actual copy function.  It will get called for the first selected item
         // then recursively call itself when the business rule invocation completes
         var fnCopy = function (i) {
             if (store.isItem(selectedItems[i])) {
                 // business rule invocation
                 // see https://github.com/SageScottsdalePlatform/SDataJavaScriptClientLib/wiki/How-To-Execute-A-Service-Operation
                 var request = new Sage.SData.Client.SDataServiceOperationRequest(service)
	                .setResourceKind('cAccWidgets')
	                .setOperationName('Copy');
                 var id = store.getValue(selectedItems[i], "$key");

                 var entry = {
                     "$name": "CopyPart",
                     "request": {
                         "caccwidgetId": id
                     }
                 };
                 request.execute(entry, {
                     success: function (result) {
                         i++;
                         if (i < selectedItems.length) {
                             fnCopy(i);
                         } else {
                             grid.refresh();
                         }
                     },
                     failure: function (result) {
                         // ?                                                
                     }
                 });

             }

         };
         fnCopy(0);
     }