@SuppressWarnings("unchecked")
    default T add(final AnnotationUsage annotation) {
        getAnnotations().add(annotation);
        return (T) this;
    }
Adds the specified {@link AnnotationUsage} to this model.

@param annotation  the new child
@return            a reference to this
common-parent/codegen/src/main/java/com/speedment/common/codegen/model/trait/HasAnnotationUsage.java