/**
 * 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 * as webTypes from '@opencensus/web-types';
import { Span } from './span';
/** Simple mock root span for use in use tests. */
export declare class RootSpan extends Span {
    /** Trace associated with this root span. */
    private readonly tracer;
    constructor(
    /** Trace associated with this root span. */
    tracer: webTypes.TracerBase, 
    /** A trace options object to build the root span. */
    context?: webTypes.TraceOptions);
    start(): void;
    end(): void;
}