Multiple components stories with Lit Element + Storybook

I have a Sidebar component written with Lit Element that includes many SidebarSection subcomponents to render different sections of the sidebar, and I'm trying to write a story with Storybook as shown in this page: Stories for multiple components, but the doc does not exist yet for Web Components and I can only find React code. I'm trying to adapt to make it work with Lit but no solution has been found.