is sensitive when the model is empty, [gtk.types.SensitivityType.Off] if the button is always insensitive or [gtk.types.SensitivityType.Auto] if it is only sensitive as long as the model has one item to be selected.
ComboBox.getButtonSensitivity
gtk.types.SensitivityType getButtonSensitivity()Returns whether the combo box sets the dropdown button sensitive or not when there are no items in the model.
Returns
[gtk.types.SensitivityType.On] if the dropdown button