Converts map element into a boolean or returns false if conversion is not possible.

        :param key: an index of element to get.

        :return: boolean value ot the element or false if conversion is not supported.

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

        :param key: an index of element to get.

        :return: boolean value ot the element or false if conversion is not supported.
        """
        value = self.get(key)
        return BooleanConverter.to_boolean(value)