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1   /*
2    * Copyright 2017 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License, version 2.0 (the
5    * "License"); you may not use this file except in compliance with the License. You may obtain a
6    * copy of the License at:
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software distributed under the License
11   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
12   * or implied. See the License for the specific language governing permissions and limitations under
13   * the License.
14   */
15  package io.netty.handler.codec.http2;
16  
17  import io.netty.util.internal.UnstableApi;
18  
19  /**
20   * Signifies that the <a href="https://tools.ietf.org/html/rfc7540#section-3.5">connection preface</a> and
21   * the initial SETTINGS frame have been sent. The client sends the preface, and the server receives the preface.
22   * The client shouldn't write any data until this event has been processed.
23   */
24  @UnstableApi
25  public final class Http2ConnectionPrefaceAndSettingsFrameWrittenEvent {
26      static final Http2ConnectionPrefaceAndSettingsFrameWrittenEvent INSTANCE =
27              new Http2ConnectionPrefaceAndSettingsFrameWrittenEvent();
28  
29      private Http2ConnectionPrefaceAndSettingsFrameWrittenEvent() {
30      }
31  }