tree d1da4392ec27580b5091eda94cdce8b98808c6e6
parent f2beea6e9cc288935fec7b87d0995f9a1e80a443
author Łukasz Strzałkowski <lukasz.strzalkowski@gmail.com> 1488519582 -0800
committer Carl Mastrangelo <notcarl@google.com> 1488519582 -0800

core: add @nullable annotation

Subchannel can be nullable, add annotation for consitency