import { EtaTemplateCache } from "../../controllers/eta-renderer/eta-template-cache.js";
import { EtaRenderHost } from "../../controllers/eta-renderer/eta-types.js";
type ScheduleFn = () => void;
type Suspendable<T> = () => Promise<T> | T;
export declare class EtaMutationObserver {
    private host;
    private cache;
    private schedule;
    private slotMo?;
    private shadowMos?;
    private dirtyRoots;
    private debounce?;
    private coalesceDelay?;
    private suspended;
    private sawMutationWhileSuspended;
    constructor(host: EtaRenderHost, cache: EtaTemplateCache, schedule: ScheduleFn);
    connect(): void;
    disconnect(): void;
    isIdle(): boolean;
    consumeDirtyRoots(): Set<HTMLElement> | undefined;
    suspend<T>(fn: Suspendable<T>): Promise<T>;
    ensureShadowRootObserved(sr: ShadowRoot, host?: HTMLElement): void;
    private _schedule;
    private _handleMutations;
    private _cleanupShadowRoot;
    private _findEligibleRoot;
}
export {};