protected override void RegisterClasses()
{
ClassMapper
.Add(() => ClassProvider.BarItem())
.If(() => ClassProvider.BarItemActive(), () => IsActive)
.If(() => ClassProvider.BarItemDisabled(), () => IsDisabled)
.If(() => ClassProvider.BarItemDropdown(), () => IsDropdown)
.If(() => ClassProvider.BarItemDropdownShow(), () => IsDropdown && barDropdown?.IsOpen == true);
base.RegisterClasses();
}