API refactor

venv/lib/python3.12/site-packages/kafka/metrics/stats/total.py

@@ -5,6 +5,8 @@ from kafka.metrics.measurable_stat import AbstractMeasurableStat
 
 class Total(AbstractMeasurableStat):
     """An un-windowed cumulative total maintained over all time."""
+    __slots__ = ('_total')
+
     def __init__(self, value=0.0):
         self._total = value