FStandaloneCompositeFont how to use

Ok thanks for the reply. In 4.6 the slate fonts work properly? I am not able to make my font work for some reason.

				SNew(STextBlock)
				.Font(&InvStorage->StacksFont)
				.Text(this, &SItemWidget::GetNumOfStacks)

I am doing something like this but my fonts are not changing.