/**
 * `data-emit` delegation (spec: "Wiring DOM events to emits — two layers",
 * Level 1). Shared between <om-widget> and <om-overlay> — both are
 * shadow-DOM content hosts where an author's zero-script markup can declare
 * `data-emit="event"` + `data-*` payload keys (DOM camel-casing, e.g.
 * `data-feature-id` -> `featureId`) instead of writing a script block.
 * Fires on click for non-form elements, change for form elements (which also
 * get their own `.value` merged in).
 */
export declare function attachDataEmitDelegation(root: ShadowRoot, emit: (event: string, payload: Record<string, unknown>) => void): void;