/**
 * Copyright 2019, 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 './types';
/** Determines whether the given String is a valid tag key. */
export declare function isValidTagKey(tagKey: TagKey): boolean;
/** Determines whether the given String is a valid tag value. */
export declare function isValidTagValue(tagValue: TagValue): boolean;