def get_as_string(self, key):
        """
        Converts map element into a string or returns "" if conversion is not possible.

        :param key: an index of element to get.

        :return: string value ot the element or "" if conversion is not supported.
        """
        value = self.get(key)
        return StringConverter.to_string(value)
Converts map element into a string or returns "" if conversion is not possible.

        :param key: an index of element to get.

        :return: string value ot the element or "" if conversion is not supported.