def __init__(self, _, url, label, template="menu-item.html"):
     self.url = resolve_string(url)
     self.label = resolve_string(label)
     self.template = resolve_string(template)
def starts_with(value, arg):
    starter = resolve_string(arg)
    return unicode(value).find(starter) == 0
def widget_attr(value, arg):
    attrName, attrValue = resolve_string(arg).split(":")
    return value.as_widget(attrs={attrName: attrValue})