import type { LightningElement } from './lightning-element';
declare class MutationTracker {
    #private;
    add(instance: LightningElement, attrName: string): void;
    enable(instance: LightningElement): void;
    disable(instance: LightningElement): void;
    renderMutatedAttrs(instance: LightningElement): string;
}
export declare const mutationTracker: MutationTracker;
export {};
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