Proxy.connectAsync

void connectAsync(gio.iostream.IOStream connection,  gio.proxy_address.ProxyAddress proxyAddress,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Asynchronous version of [gio.proxy.Proxy.connect].

Parameters

`connection`	a #GIOStream
`proxyAddress`	a #GProxyAddress
`cancellable`	a #GCancellable
`callback`	a #GAsyncReadyCallback