def maximum_size_estimated(self):
        """
        Get the CoRE Link Format sz attribute of the resource.

        :return: the CoRE Link Format sz attribute
        """
        value = "sz="
        lst = self._attributes.get("sz")
        if lst is None:
            value = ""
        else:
            value += "\"" + str(lst) + "\""
        return value
Get the CoRE Link Format sz attribute of the resource.

        :return: the CoRE Link Format sz attribute