import { type LitElement } from 'lit';
import type { MixinBase, MixinReturn } from './mixin';
export interface IConnectedPromiseResolve {
    isConnectedPromiseResolve: () => void;
    isConnectedPromise: Promise<void>;
}
export declare function mixinConnectedPromiseResolve<T extends MixinBase<LitElement>>(base: T): MixinReturn<T, IConnectedPromiseResolve>;
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