@Nullable
    AnnotatedServiceExtensions annotatedServiceExtensions() {
        return annotatedServiceExtensions;
    }
Sets the {@link RequestConverterFunction}s, {@link ResponseConverterFunction}
and {@link ExceptionHandlerFunction}s for creating an {@link AnnotatedServiceExtensions}.

@param requestConverterFunctions the {@link RequestConverterFunction}s
@param responseConverterFunctions the {@link ResponseConverterFunction}s
@param exceptionHandlerFunctions the {@link ExceptionHandlerFunction}s
core/src/main/java/com/linecorp/armeria/server/VirtualHostBuilder.java