# File lib/deltacloud/drivers/vsphere/vsphere_driver.rb, line 331
    def destroy_instance(credentials, instance_id)
      vm = find_vm(credentials, instance_id)
      user_file = vm[:instance].config[:extraConfig].select { |k| k.key == 'user_iso_file' }.first
      VSphere::FileManager::delete_iso!(vm[:instance].send(:datastore).first, user_file.value) if user_file
      vm[:instance].Destroy_Task.wait_for_completion
    end