public ResteasyServiceBuilder<T> requestContextConverter(
            Class<T> contextClass, Function<ServiceRequestContext, T> contextConverter) {
        this.contextClass = requireNonNull(contextClass, "contextClass");
        this.contextConverter = requireNonNull(contextConverter, "contextConverter");
        return this;
    }
Defines an optional converter that converts Armeria {@link ServiceRequestContext} to a target class.
This could be useful to expose {@link ServiceRequestContext} via custom interface as part of JAX-RS API.
The custom context interface is to be used with JAX-RS {@link javax.ws.rs.core.Context} annotation.
@param contextClass the target custom context class
@param contextConverter the function that adopts {@link ServiceRequestContext} to {@code contextClass}
resteasy/src/main/java/com/linecorp/armeria/server/resteasy/ResteasyServiceBuilder.java