/**
 * Copyright 2018, OpenCensus Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { TagKey, TagValue } from '../tags/types';
import { AggregationData, Measurement } from './types';
export declare class Recorder {
    static addMeasurement(aggregationData: AggregationData, measurement: Measurement, attachments?: {
        [key: string]: string;
    }): AggregationData;
    /** Gets the tag values from tags and columns */
    static getTagValues(tags: Map<TagKey, TagValue>, columns: TagKey[]): Array<TagValue | null>;
    private static addToDistribution;
    private static addToSum;
    private static addToCount;
    private static addToLastValue;
}