Uses the new web component export feature of Flow 1.5 to export server side Java classes as web components.

For example

@Tag("my-fancy-component")
public static class MyFancyComponentExporter implements WebComponentExporter<MyFancyComponent> {

  @Override
  public void define(WebComponentDefinition<MyFancyComponent> definition) {
    definition.addProperty("response", "Hello").onChange((component, value) -> {
                        component.response = value;
    });
    definition.addProperty("message", "").onChange((component, value) -> {
                        component.setMessage(value);
    });
  }
}

exports the component class MyFancyComponent and publishes two properties message and response. If these are changed in the browser, the corresponding field in the component is updated or the corresponding method is called.