export type MutationCallback = (mutations: MutationRecord[]) => void;
export declare class MutationObserverManager {
    private observer;
    private isObserving;
    private callback;
    constructor();
    start(callback: MutationCallback): void;
    stop(): void;
    private filterRelevantMutations;
    private hasRelevantChildListChanges;
    private hasRelevantAttributeChanges;
    private isMediaElement;
    private containsMediaElements;
    isActive(): boolean;
    pause(): void;
    resume(): void;
}
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