You won't find implementation of sidebar here, because it has been implemented in this site. But you can find the coding of it here
<LayoutContainer>
<ChildContent>
@Body
</ChildContent>
<DrawerHeaderContent>
<h1>Some title</h1>
</DrawerHeaderContent>
<DrawerContent>
<DrawerMenu/>
<DrawerMenu>
<DrawerMenuItem/>
</DrawerMenu>
</DrawerContent>
<NavbarContent>
You can use any html with suitable css, and you can use NavMenu to create dropdown menus in horizontal Navbar
</NavbarContent>
</LayoutContainer>