import { ICollectionStrategy, CollectionStrategyType } from './collection-strategy.interface';
/**
 * Factory for creating collection aggregation strategies
 */
export declare class CollectionStrategyFactory {
    private static strategies;
    /**
     * Get a strategy instance (singleton per type)
     */
    static getStrategy(type: CollectionStrategyType): ICollectionStrategy;
    /**
     * Clear cached strategies (mainly for testing)
     */
    static clearCache(): void;
}
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