Add function for likely_done case

src/AsapoWorker/streamer.py

@@ -168,6 +168,7 @@ class Streamer:
             return
 
         if (has_data or new_substream is not None) and self.end_of_stream_callback:
+            self.worker.handle_likely_done()
             # call the callback only once
             self.end_of_stream_callback(new_substream)
             self.end_of_stream_callback = None

src/AsapoWorker/worker.py

@@ -29,6 +29,12 @@ class Worker:
     def handle_receiver_critical_error(self):
         self.handle_receiver_error()
 
+    def handle_likely_done(self):
+        """
+        Call when substream is likely done and new substream is created
+        """
+        pass
+
     def pre_scan(self, data, metadata):
         """
         If metadata stream is given this function is called at the beginning of