import { LitElement } from 'lit';
import { AbstractConstructor } from './constructor.ts';
export declare abstract class SbbHydrationMixinType {
    /**
     * Returns a Promise that resolves when the element has completed hydration.
     * The Promise value is a boolean that is `true` if the element required hydration
     * and `false` if not.
     *
     * @return A promise of a boolean that resolves to true once the hydration completed.
     */
    get hydrationComplete(): Promise<boolean>;
    /** Returns whether hydration is required and not completed. */
    protected get hydrationRequired(): boolean;
}
/**
 * This mixin extends a base class with functionality to check if hydration is completed.
 * It also delays slotchange events until hydration is complete.
 *
 * @param base The class to extend.
 * @returns A class extended with the hydration check functionality.
 */
export declare const SbbHydrationMixin: <T extends AbstractConstructor<LitElement>>(base: T) => AbstractConstructor<SbbHydrationMixinType> & T;
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