/**
 * @module botbuilder-ai
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { QnAMakerResult } from '../qnamaker-interfaces';
/**
 * Generate Answer api utils class.
 *
 * @summary
 * This class is helper class for generate answer api, which is used to make queries to a single QnA Maker knowledge base and return the result.
 */
export declare class ActiveLearningUtils {
    /** Minimum Score For Low Score Variation. */
    static readonly MinimumScoreForLowScoreVariation = 20;
    /** Maximum Score For Low Score Variation. */
    static readonly MaximumScoreForLowScoreVariation = 95;
    /** Previous Low Score Variation Multiplier. */
    static readonly PreviousLowScoreVariationMultiplier = 0.7;
    /** Max Low Score Variation Multiplier. */
    static readonly MaxLowScoreVariationMultiplier = 1;
    /**
     * Returns list of qnaSearch results which have low score variation.
     *
     * @param {QnAMakerResult[]} qnaSearchResults A list of results returned from the QnA getAnswer call.
     * @returns {QnAMakerResult[]} List of filtered qnaSearch results.
     */
    static getLowScoreVariation(qnaSearchResults: QnAMakerResult[]): QnAMakerResult[];
    private static includeForClustering;
}
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