Returns %TRUE if the model has a default sort function. This is used primarily by GtkTreeViewColumns in order to determine if a model can go back to the default state, or not.
Return: %TRUE, if the model has a default sort function
See Implementation
Returns %TRUE if the model has a default sort function. This is used primarily by GtkTreeViewColumns in order to determine if a model can go back to the default state, or not.
Return: %TRUE, if the model has a default sort function