The QUERY_STRING parsed into an instance of :class:`MultiDict`.

def GET(self):
        """ The QUERY_STRING parsed into an instance of :class:`MultiDict`. """
        data = parse_qs(self.query_string, keep_blank_values=True)
        get = self.environ['bottle.get'] = MultiDict()
        for key, values in six.iteritems(data):
            for value in values:
                get[key] = value
        return get