@TypeInfo("io.vertx.ceylon.core.http::WebSocketStream") public WebSocketStream handler( final @TypeInfo("ceylon.language::Anything(io.vertx.ceylon.core.http::WebSocket)?") @Name( "handler") Callable<?> handler) { io.vertx.core.Handler<io.vertx.core.http.WebSocket> arg_0 = handler == null ? null : new io.vertx.core.Handler<io.vertx.core.http.WebSocket>() { public void handle(io.vertx.core.http.WebSocket event) { handler.$call$( (Object) io.vertx.ceylon.core.http.WebSocket.TO_CEYLON .converter() .safeConvert(event)); } }; WebSocketStream ret = io.vertx.ceylon.core.http.WebSocketStream.TO_CEYLON .converter() .safeConvert(delegate.handler(arg_0)); return this; }