launch
open fun launch(parent: Window? = null, cancellable: <Error class: unknown class>? = null, callback: <Error class: unknown class>)
Launch an application to open the file.
This may present an app chooser dialog to the user.
Since
4.10
Parameters
parent
the parent GtkWindow
cancellable
a GCancellable to cancel the operation
callback
a callback to call when the operation is complete