default Stream<String> renderJavadocTags(Generator gen, M model) {
        final Stream<String> stream = gen.onEach(model.getTags());
        
        if (model.getTags().isEmpty()) {
            return stream;
        } else {
            return Stream.concat(
                Stream.of(" "), // to get an empty line before the tags...
                stream
            );
        }
    }
Returns a stream of javadoc lines generated from the tags in the
specified model. If the stream is not empty it is prepended by an
empty line.

@param gen    the generator
@param model  the model
@return       the generated code
common-parent/codegen/src/main/java/com/speedment/common/codegen/internal/java/view/trait/HasJavadocTagsView.java