import { StyleSheet } from './sheet';
declare type BaseRules = {
    [key: string]: string | number;
};
export declare type StyleTracker = Map<string, {
    displayName?: string;
    namespace: string;
    rules: BaseRules;
    styleObject?: Object;
    selector: string;
    style: string;
    className: string;
}>;
export declare class GarbageCollector {
    usedClasses: Map<string, number>;
    classRemovalQueue: Set<string>;
    activeUids: Set<string>;
    constructor(sheet: StyleSheet, tracker: StyleTracker);
    tracker: StyleTracker;
    sheet: StyleSheet;
    garbageTimer?: any;
    hasQueuedCollection(): boolean;
    getReferenceCount(key: string): number;
    registerClassUse: (name: string) => void;
    deregisterClassUse: (name: string) => void;
    scheduleGarbage: () => void;
    haltGarbage(): void;
    getCollectionQueue(): string[];
    collectGarbage(): void;
    flush(): void;
}
export {};
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