declare namespace org {
    namespace eclipse {
        namespace jetty {
            namespace websocket {
                namespace client {
                    namespace masks {
                        interface Masker {
                            setMask(arg0: org.eclipse.jetty.websocket.common.WebSocketFrame): void
                        }
                        interface Masker$$Lambda {
                            (arg0: org.eclipse.jetty.websocket.common.WebSocketFrame): void
                        }
                    }
                }
            }
        }
    }
}