code: public static xen_hotfix[] apply(nitro_service client, xen_hotfix[] resources) throws Exception
  	{
  		if(resources == null)
  			throw new Exception("Null resource array");
  		
  		if(resources.length == 1)
  			return ((xen_hotfix[]) resources[0].perform_operation(client, "apply"));
  		
  		return ((xen_hotfix[]) perform_operation_bulk_request(client, resources, "apply"));
  	}
docs: <pre>
  Use this operation to apply new xen hotfixes in bulk.
  </pre>