What is the purpose of Shutdown(ctx context.Context) ?

[arianvp]

nomad-driver-lxc/lxc/driver.go

Line 184 in 6e65342

func (d *Driver) Shutdown(ctx context.Context) error {

Reading the nomad source code, this function is never called by nomad. Instead,
nomad calls a function Shutdown() error (without a context) instead.

I am asking because i'm trying to implement my own driver and I can't get it to cleanly shutdown