http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you 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.
 */

package io.netty.handler.codec.http2;

import io.netty.util.internal.UnstableApi;


HTTP/2 PING Frame.

/**
 * HTTP/2 PING Frame.
 */
@UnstableApi
public interface Http2PingFrame extends Http2Frame {

    
When true, indicates that this ping is a ping response. 
/**
     * When {@code true}, indicates that this ping is a ping response.
     */
    boolean ack();

    
Returns the eight byte opaque data.

/**
     * Returns the eight byte opaque data.
     */
    long content();
}