Warning gtk_notebook_get_tab_vborder has been deprecated since version 3.4 and should not be used in newly-written code. this function returns zero Returns the vertical width of a tab border. Since 2.22
vertical width of a tab border
See Implementation
Warning gtk_notebook_get_tab_vborder has been deprecated since version 3.4 and should not be used in newly-written code. this function returns zero Returns the vertical width of a tab border. Since 2.22