Returns the effective limit value for this Limit,
        taking into account limit overrides and Trusted
        Advisor data. None is returned for limits that are
        explicitly unlimited.

        :returns: effective limit value, ``int`` or ``None``

def get_limit(self):
        """
        Returns the effective limit value for this Limit,
        taking into account limit overrides and Trusted
        Advisor data. None is returned for limits that are
        explicitly unlimited.

        :returns: effective limit value, ``int`` or ``None``
        """
        limit_type = self.get_limit_source()
        if limit_type == SOURCE_OVERRIDE:
            return self.limit_override
        elif limit_type == SOURCE_API:
            return self.api_limit
        elif limit_type == SOURCE_TA:
            if self.ta_unlimited is True:
                return None
            return self.ta_limit
        return self.default_limit