Function Fl_Menu_Item_insert

pub unsafe extern "C" fn Fl_Menu_Item_insert(
    self_: *mut Fl_Menu_Item,
    index: c_int,
    name: *const c_char,
    shortcut: c_int,
    cb: Fl_Callback,
    data: *mut c_void,
    flag: c_int,
) -> c_int