/*!
 * Copyright (c) 2015-2020 Cisco Systems, Inc. See LICENSE file.
 */
/**
 * @description Metrics handles all the call metrics events
 * @export
 * @class Metrics
 */
declare class Metrics {
    static instance: Metrics;
    webex: any;
    /**
     * Create Metrics Object
     * @constructor
     * @public
     * @memberof Meetings
     */
    constructor();
    /**
     * Initializes the Metrics singleton with a meeting Collection.
     *
     * @param {Object} webex  webex SDK object
     *
     * @returns {void}
     */
    initialSetup(webex: object): void;
    /**
     * Uploads given metric to the Metrics service as an Behavioral metric.
     * Metadata about the environment such as browser, OS, SDK and their versions
     * are automatically added when the metric is sent.
     *
     * The Metrics service will send an Behavioral metric to InfluxDB for
     * aggregation.
     * See https://confluence-eng-gpk2.cisco.com/conf/display/WBXT/Getting+started+with+Metrics+Service.
     *
     * @param {string} metricName  Name of the metric (measurement) to send
     * @param {Object} metricFields  Key-valye pairs of data or values about this metric
     * @param {Object} metricTags  Key-value pairs of metric metadata
     *
     * @returns {void}
     */
    sendBehavioralMetric(metricName: string, metricFields?: object, metricTags?: object): void;
    /**
     * Flattens an object into one that has no nested properties. Each level of nesting is represented
     * by "_" in the flattened object property names.
     * This function is needed, because Amplitude doesn't allow passing nested objects as metricFields.
     * Use this function for metricFields before calling sendBehavioralMetric() if you want to send
     * nested objects in your metrics.
     *
     * If the function is called with a literal, it returns an object with a single property "value"
     * and the literal value in it.
     *
     * @param {any} payload object you want to flatten
     * @param {string} prefix string prefix prepended to any property names in flatten object
     * @returns {Object}
     */
    prepareMetricFields(payload?: any, prefix?: string): {};
}
declare const instance: Metrics;
export default instance;