declare namespace org {
    namespace eclipse {
        namespace jetty {
            namespace websocket {
                namespace api {
                    namespace extensions {
                        interface Extension extends org.eclipse.jetty.websocket.api.extensions.IncomingFrames , org.eclipse.jetty.websocket.api.extensions.OutgoingFrames {
                            getConfig(): org.eclipse.jetty.websocket.api.extensions.ExtensionConfig
                            getName(): string
                            isRsv1User(): boolean
                            isRsv2User(): boolean
                            isRsv3User(): boolean
                            setNextIncomingFrames(arg0: org.eclipse.jetty.websocket.api.extensions.IncomingFrames): void
                            setNextOutgoingFrames(arg0: org.eclipse.jetty.websocket.api.extensions.OutgoingFrames | org.eclipse.jetty.websocket.api.extensions.OutgoingFrames$$Lambda): void
                        }
                    }
                }
            }
        }
    }
}