http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
public interface io.undertow.server.HttpUpgradeListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.undertow.server.HttpUpgradeListener
  super_class: java.lang.Object
{
  public abstract void handleUpgrade(org.xnio.StreamConnection, io.undertow.server.HttpServerExchange);
    descriptor: (Lorg/xnio/StreamConnection;Lio/undertow/server/HttpServerExchange;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
                  Name  Flags
      streamConnection  final
      exchange          
}
SourceFile: "HttpUpgradeListener.java"