docs: @Override public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
  		if (errorToShow != null) {
  			if (errorToShow != null) {
  				Set<? extends Element> rootElements = roundEnv.getRootElements();
  				if (!rootElements.isEmpty()) {
  					processingEnv.getMessager().printMessage(Kind.WARNING, errorToShow, rootElements.iterator().next());
  					errorToShow = null;
  				}
  			}
  		}
  		return false;
  	}