Enum Top 

enum Top {
    Sub(&'static [(&'static str, Option<char>, Option<Command>)]),
    Views,
    Leaf(Option<Command>),
}

What a top-level item does.

Variants

Sub(&'static [(&'static str, Option<char>, Option<Command>)])

Opens a submenu. An empty one draws disabled.

Views

Opens the View submenu: Model Browser, then the views the caller passes to show.

Leaf(Option<Command>)

Runs a command directly (None: disabled).