gui.displays reference

Shortcut	Renders	Reference
gui.displays.alert	an alert with a level (info / warning / error / success)	Alert
gui.displays.display	a render-callback display (Programmatic-only)	Renderer
gui.displays.custom	your custom display widget	Custom Widgets

The Programmatic-only gui.displays.display(callback) lets you return raw framework markup (Lit html, React JSX, Angular template) from a function — there’s no JSON equivalent for this widget because it requires a function reference.