Pixbuf.saveToStreamvAsync

void saveToStreamvAsync(gio.output_stream.OutputStream stream,  string type,  string[]  optionKeys =  null,  string[]  optionValues =  null,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Saves pixbuf to an output stream asynchronously.

For more details see [gdkpixbuf.pixbuf.Pixbuf.saveToStreamv], which is the synchronous version of this function.

When the operation is finished, callback will be called in the main thread.

You can then call [gdkpixbuf.pixbuf.Pixbuf.saveToStreamFinish] to get the result of the operation.

Parameters

`stream`	a [gio.output_stream.OutputStream] to which to save the pixbuf
`type`	name of file format
`optionKeys`	name of options to set
`optionValues`	values for named options
`cancellable`	optional [gio.cancellable.Cancellable] object, `NULL` to ignore
`callback`	a [gio.types.AsyncReadyCallback] to call when the pixbuf is saved