get_focusable
Description:
Checks if a list item has been set to be focusable via set_focusable.
Parameters:
| this | a `GtkColumnViewCell` | 
Returns:
| true if the item is focusable | 
Checks if a list item has been set to be focusable via set_focusable.
| this | a `GtkColumnViewCell` | 
| true if the item is focusable |