private void processFromProperties(TypeElement type, Set<TypeElement> types) {
    List<? extends Element> children = type.getEnclosedElements();
    VisitorConfig config = conf.getConfig(type, children);

    // fields
    if (config.visitFieldProperties()) {
      for (VariableElement field : ElementFilter.fieldsIn(children)) {
        TypeElement typeElement = typeExtractor.visit(field.asType());
        if (typeElement != null) {
          types.add(typeElement);
        }
      }
    }

    // getters
    if (config.visitMethodProperties()) {
      for (ExecutableElement method : ElementFilter.methodsIn(children)) {
        String name = method.getSimpleName().toString();
        if ((name.startsWith("get") || name.startsWith("is")) && method.getParameters().isEmpty()) {
          TypeElement typeElement = typeExtractor.visit(method.getReturnType());
          if (typeElement != null) {
            types.add(typeElement);
          }
        }
      }
    }
  }
  private void handleEmbeddedType(Element element, Set<TypeElement> elements) {
    TypeMirror type = element.asType();
    if (element.getKind() == ElementKind.METHOD) {
      type = ((ExecutableElement) element).getReturnType();
    }
    String typeName = type.toString();

    if (typeName.startsWith(Collection.class.getName())
        || typeName.startsWith(List.class.getName())
        || typeName.startsWith(Set.class.getName())) {
      type = ((DeclaredType) type).getTypeArguments().get(0);

    } else if (typeName.startsWith(Map.class.getName())) {
      type = ((DeclaredType) type).getTypeArguments().get(1);
    }

    TypeElement typeElement = typeExtractor.visit(type);

    if (typeElement != null
        && !TypeUtils.hasAnnotationOfType(typeElement, conf.getEntityAnnotations())) {
      if (!typeElement.getQualifiedName().toString().startsWith("java.")) {
        elements.add(typeElement);
      }
    }
  }