/**
 * -------------------------------------------------------------------------------------------
 * Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the MIT License.
 * See License in the project root for license information.
 * -------------------------------------------------------------------------------------------
 */
/**
 * @module TelemetryHandlerOptions
 */
import { Context } from "../../IContext";
import { MiddlewareOptions } from "./IMiddlewareOptions";
/**
 * @enum
 * @property {number} NONE - The hexadecimal flag value for nothing enabled
 * @property {number} REDIRECT_HANDLER_ENABLED - The hexadecimal flag value for redirect handler enabled
 * @property {number} RETRY_HANDLER_ENABLED - The hexadecimal flag value for retry handler enabled
 * @property {number} AUTHENTICATION_HANDLER_ENABLED - The hexadecimal flag value for the authentication handler enabled
 */
export declare enum FeatureUsageFlag {
    NONE = 0,
    REDIRECT_HANDLER_ENABLED = 1,
    RETRY_HANDLER_ENABLED = 2,
    AUTHENTICATION_HANDLER_ENABLED = 4
}
/**
 * @class
 * @implements MiddlewareOptions
 * Class for TelemetryHandlerOptions
 */
export declare class TelemetryHandlerOptions implements MiddlewareOptions {
    /**
     * @private
     * A member to hold the OR of feature usage flags
     */
    private featureUsage;
    /**
     * @public
     * @static
     * To update the feature usage in the context object
     * @param {Context} context - The request context object containing middleware options
     * @param {FeatureUsageFlag} flag - The flag value
     * @returns nothing
     */
    static updateFeatureUsageFlag(context: Context, flag: FeatureUsageFlag): void;
    /**
     * @private
     * To set the feature usage flag
     * @param {FeatureUsageFlag} flag - The flag value
     * @returns nothing
     */
    private setFeatureUsage;
    /**
     * @public
     * To get the feature usage
     * @returns A feature usage flag as hexadecimal string
     */
    getFeatureUsage(): string;
}