From 20898aa2f2a47ee75a58319a12ca1cc7cc843b48 Mon Sep 17 00:00:00 2001
From: Pau Freixes <pau.freixes@skyscanner.net>
Date: Tue, 21 Apr 2020 16:45:33 +0200
Subject: [PATCH] Fix type issue

---
 src/python/grpcio/grpc/experimental/aio/_channel.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/python/grpcio/grpc/experimental/aio/_channel.py b/src/python/grpcio/grpc/experimental/aio/_channel.py
index edd956b973a..89c556c997e 100644
--- a/src/python/grpcio/grpc/experimental/aio/_channel.py
+++ b/src/python/grpcio/grpc/experimental/aio/_channel.py
@@ -67,7 +67,7 @@ class _BaseMultiCallable:
     _method: bytes
     _request_serializer: SerializingFunction
     _response_deserializer: DeserializingFunction
-    _interceptors: Sequence[ClientInterceptor]
+    _interceptors: Optional[Sequence[ClientInterceptor]]
     _loop: asyncio.AbstractEventLoop
 
     # pylint: disable=too-many-arguments
@@ -77,7 +77,7 @@ class _BaseMultiCallable:
             method: bytes,
             request_serializer: SerializingFunction,
             response_deserializer: DeserializingFunction,
-            interceptors: Sequence[ClientInterceptor],
+            interceptors: Optional[Sequence[ClientInterceptor]],
             loop: asyncio.AbstractEventLoop,
     ) -> None:
         self._loop = loop