/**
 * Non-reactive instance state for the inspector details pane: reactive
 * controllers, `@lit/task` instances, signals and plain class fields. Runs in
 * the inspected page and reads a live element, so everything is duck-typed (no
 * dependency on the libraries) and read-only: no `run()`, no `set()`, no
 * getter on an unrecognised object, and a signal that could run user code is
 * never evaluated.
 */
import type { InspectorExtra } from '../../../types/inspector.js';
/**
 * Calls `onChange` when a context provider on `el` hands its subscribers a
 * new value. A provider's `setValue` does not update its own host, so the
 * host's details would otherwise show the old value until something else
 * renders it. Wraps each provider's own `updateObservers` (an instance arrow
 * function, kept by name in the production build) on this element only;
 * returns a function that puts them back.
 */
export declare const onProviderChange: (el: Element, onChange: () => void) => (() => void);
/**
 * The element's non-reactive instance state, capped at {@link MAX_EXTRAS}:
 * controllers and tasks first (in registration order), then signals and tasks
 * held in own fields, then plain own fields. Never throws.
 */
export declare const collectExtras: (el: Element) => InspectorExtra[];
/**
 * The live value behind the extra named `name`, as {@link collectExtras}
 * names it, or `undefined` when there is none or it cannot be read.
 */
export declare const extraValue: (el: Element, name: string) => {
    value: unknown;
} | undefined;
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