code: public Iterable<? extends Completion> getCompletions(Element element,
                                                           AnnotationMirror annotation,
                                                           ExecutableElement member,
                                                           String userText) {
          return Collections.emptyList();
      }
docs: Returns an empty iterable of completions.
  
  @param element {@inheritDoc}
  @param annotation {@inheritDoc}
  @param member {@inheritDoc}
  @param userText {@inheritDoc}