import { ReactiveElement } from 'lit';
/**
 * The symbol resolving the `ReactiveElement` which owns the update lifecycle of a given context.
 *
 * A `ReactiveElement` resolves to itself, while a `Controller` resolves to its host, which allows
 * decorators such as `state`, `query`, `queryAll`, `event`, `eventListener` and `updated` to behave
 * identically regardless of whether they are applied on a component or on a controller.
 */
export declare const host: unique symbol;
export interface HostProvider {
    readonly [host]: ReactiveElement;
}
declare module '@lit/reactive-element' {
    interface ReactiveElement {
        readonly [host]: ReactiveElement;
    }
}
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