Add an is_acked property to nats.aio.msg.Msg

Author: charles-dyfis-net

nats/aio/msg.py

@@ -77,6 +77,13 @@ def header(self) -> Optional[Dict[str, str]]:
         """
         return self.headers
 
+    @property
+    def is_acked(self) -> bool:
+        """
+        Have we sent a terminal ack message (not in-progress) in response to this original message?
+        """
+        return self._ackd
+
     @property
     def sid(self) -> int:
         """