This just flat out isnt working for me :/ I have a view upon which I put a

This just flat out isnt working for me :/

I have a view upon which I put a vertical Layout with a panel extended by StackPanel. However, I just see a normal Panel. Any suggestions?

Relevant Code:
VerticalLayout verticalLayout = new VerticalLayout()
Panel section1 = new SectionPanel(“StackPanel Yay!”)
StackPanel.extend(section1)
verticalLayout.addComponent(section1)

Vaadin Version: 8.1.7