Howto restart vmware-vpxa using the vMA 4.1

I like to know Howto restart vmware-vpxa on an ESXi host using the vMA 4.1

Currently i do it with a PowerCLI procedure

Connect-VIServer «hostname»
$vpx = Get-VMHostService | where {$_.Key -eq 'vmware-vpxa'}
Restart-VMHostService $vpx -Confirm

But dont know how to do it using the vMA