--- old/src/java.net.http/share/classes/jdk/internal/net/http/websocket/RawChannel.java	2021-02-18 17:06:03.000000000 +0300
+++ new/src/java.net.http/share/classes/jdk/internal/net/http/websocket/RawChannel.java	2021-02-18 17:06:03.000000000 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -40,6 +40,7 @@
     interface Provider {
 
         RawChannel rawChannel() throws IOException;
+        void closeRawChannel() throws IOException;
     }
 
     interface RawEvent {