Asynchronously retrieves a snapshot of web_view for region.
options specifies how the snapshot should be rendered.
When the operation is finished, callback will be called. You must call webkit.web_view.WebView.getSnapshotFinish to get the result of the operation.
the #WebKitSnapshotRegion for this snapshot
#WebKitSnapshotOptions for the snapshot
a #GCancellable
a #GAsyncReadyCallback
Asynchronously retrieves a snapshot of web_view for region.
options specifies how the snapshot should be rendered.
When the operation is finished, callback will be called. You must call webkit.web_view.WebView.getSnapshotFinish to get the result of the operation.