> This function is slow. Only use it for debugging and/or testing > purposes.
Checks if the given iter is a valid iter for this #GtkListStore.
A #GtkTreeIter.
true if the iter is valid, false if the iter is invalid.
> This function is slow. Only use it for debugging and/or testing > purposes.
Checks if the given iter is a valid iter for this #GtkListStore.