public static <T> HttpResponse fromPublisher(Publisher<T> contentPublisher,
                                                 Function<? super T, ? extends ServerSentEvent> converter) {
        return fromPublisher(defaultHttpHeaders, contentPublisher, HttpHeaders.of(), converter);
    }
Creates a new Server-Sent Events stream from the specified {@link Publisher} and {@code converter}.

@param contentPublisher the {@link Publisher} which publishes the objects supposed to send as contents
@param converter the converter which converts published objects into {@link ServerSentEvent}s
core/src/main/java/com/linecorp/armeria/server/streaming/ServerSentEvents.java