Sets a group name for @notebook.
Notebooks with the same name will be able to exchange tabs via drag and drop. A notebook with a %NULL group name will not be able to exchange tabs with any other notebook.
the name of the notebook group, or %NULL to unset it
See Implementation
Sets a group name for @notebook.
Notebooks with the same name will be able to exchange tabs via drag and drop. A notebook with a %NULL group name will not be able to exchange tabs with any other notebook.