ObjectWrap.connectSignalClosure

gulong connectSignalClosure(string signalDetail, DClosure closure, Flag!"After" after = No.After)

Connect a D closure to an object signal.

`signalDetail`	Signal name and optional detail separated by '::'
`closure`	Closure to connect signal to
`after`	Yes.After to invoke the signal after the default handler, No.After to execute before (default)

The signal connection ID