@API(status = API.Status.STABLE)
    public void registerBuilderDecorator(final @NonNull BuilderDecorator<C> decorator) {
        this.builderDecorators.add(decorator);
    }
Registers the given {@code decorator}.
<p>
The decorators are allowed to modify the command builders to set up default values.
All other steps of the command construction process take priority over the decorators.

@param decorator the decorator
cloud-annotations/src/main/java/org/incendo/cloud/annotations/AnnotationParser.java