Add Action to Vcs.Checkout

I'm learning how to create intellij idea plugin.
Then i just create an action, set the group-id to Vcs.Checkout, my intention to make this action appear inside "Checkout from Version Control" menu.
But nothing displayed there.

I tried setting the group-id to Vcs.Import, then i can see my action under "Import into Version Control".

Did i make mistake?


Thank you.