def begin_power_off(resource_group_name, vm_scale_set_name, instance_id, custom_headers:nil)
      response = begin_power_off_async(resource_group_name, vm_scale_set_name, instance_id, custom_headers:custom_headers).value!
      nil
    end
def begin_power_off(resource_group_name, vm_scale_set_name, instance_id, custom_headers:nil)
      response = begin_power_off_async(resource_group_name, vm_scale_set_name, instance_id, custom_headers:custom_headers).value!
      nil
    end
Power off (stop) a virtual machine in a VM scale set. Note that resources are
 still attached and you are getting charged for the resources. Instead, use
 deallocate to release resources and avoid charges.

 @param resource_group_name [String] The name of the resource group.
 @param vm_scale_set_name [String] The name of the VM scale set.
 @param instance_id [String] The instance ID of the virtual machine.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.