intermediate changes

ref:102662f6c42fba80d7bfd4a328124cbb4294be48

1 files changed, 6 insertions, 0 deletions

diff --git a/contrib/tools/python3/src/Lib/asyncio/transports.py b/contrib/tools/python3/src/Lib/asyncio/transports.py
index 45e155c94c..73b1fa2de4 100644
--- a/contrib/tools/python3/src/Lib/asyncio/transports.py
+++ b/contrib/tools/python3/src/Lib/asyncio/transports.py
@@ -99,6 +99,12 @@ class WriteTransport(BaseTransport):
         """Return the current size of the write buffer."""
         raise NotImplementedError
 
+    def get_write_buffer_limits(self):
+        """Get the high and low watermarks for write flow control. 
+        Return a tuple (low, high) where low and high are 
+        positive number of bytes."""
+        raise NotImplementedError
+
     def write(self, data):
         """Write some data bytes to the transport.