Get workspace record value using Browser UI

Content

Hi friends,

I want to get  all Workspace record value using Agent browser scripts  and check  validation before save .

I'm not  able  to get value of workspace (custom object). Please check my code and  let us know your suggestions

Code Snippet

             <script>
alert ("start");
var myAppId = 'Customapp'; // Application ID
var extensibilityApiVersion = '1.0'; // Extensibility API version (optional because the current version is 1.0)
ORACLE_SERVICE_CLOUD.extension_loader.load(myAppId , extensibilityApiVersion).then(function(extensionProvider)
	{
	
	extensionProvider.registerWorkspaceExtension(function(WorkspaceRecord)
		{	
	       var test= WorkspaceRecord.getFieldValues(['$Co$Inventory.UnitNumber']);
		   alert (test);
		   });
	});
</script>