setAction
⚠️ Deprecated ⚠️
This is deprecated since version 4.10.
Use class@Gtk.FileDialog instead
---Sets the type of operation that the chooser is performing.
The user interface is adapted to suit the selected action.
For example, an option to create a new folder might be shown if the action is %GTK_FILE_CHOOSER_ACTION_SAVE but not if the action is %GTK_FILE_CHOOSER_ACTION_OPEN.
Parameters
action
the action that the file selector is performing