a #GtkTreePath
return location for the size
%TRUE
Deprecated: Combo box formerly used this to calculate the sizes for cellviews, now you can achieve this by either using the #GtkCellView:fit-model property or by setting the currently displayed row of the #GtkCellView and using gtk_widget_get_preferred_size().
2.6
Sets @requisition to the size needed by @cell_view to display the model row pointed to by @path.