/**
 * Lit dev-mode warnings, as the `lit-warnings` timeline layer.
 *
 * Each warning `lit-warnings.ts` captures becomes a `warning:<code>` point
 * event carrying the code and message, attributed to the element that was
 * updating when Lit issued it, else to the tag the message names. One issued
 * mid-update carries that tick's groupId, so it folds under the update.
 * Warnings issued before a recording started, or before the layer was turned
 * on, are replayed then, because the mistake is still in the page and a
 * recording that omitted it would suggest otherwise; those carry
 * `replayed: true` and go to the panel only, since the Chrome tracks already
 * got them when they happened.
 *
 * Nothing is emitted unless recording with the layer on.
 */
import { type LifecycleEmit } from './lifecycle.js';
export interface WarningsLayerOptions {
    /** Where a warning goes as it is issued. */
    emit: LifecycleEmit;
    /** Where a replay goes: the panel only. */
    replayTo: LifecycleEmit;
    recording: () => boolean;
    enabled: () => boolean;
    /** The update tick an element is inside right now, if any. */
    groupOf: (el: object) => string | undefined;
}
/**
 * Wires captured warnings into `emit`; returns the replay to run when the
 * panel starts recording or turns the layer on.
 */
export declare const installWarningsLayer: ({ emit, replayTo, recording, enabled, groupOf, }: WarningsLayerOptions) => {
    replay: () => void;
};
//# sourceMappingURL=warnings-layer.d.ts.map