Function build_user_interfaces

pub fn build_user_interfaces<'a, P: Program, C>(
    program: &'a P,
    debug: &mut Debug,
    window_manager: &mut WindowManager<P, C>,
    cached_user_interfaces: FxHashMap<Id, Cache>,
    clipboard: &mut Clipboard,
) -> FxHashMap<Id, UserInterface<'a, P::Message, P::Theme, P::Renderer>>
where
    C: Compositor<Renderer = P::Renderer>,
    P::Theme: DefaultStyle,

Build the user interface for every window.