git-subtree-dir: kafka
git-subtree-split: c89bd5169277e2e7a6f29674d54c085a8cdbbfe3

Scenario (working branch is merge-kafka-python):
git remote add kafka-python git@github.com:dpkp/kafka-python.git
git fetch kafka-python
git branch kafka-python-master kafka-python/master
git switch kafka-python-master
git subtree split --prefix=kafka -b kafka-python-kafka
git switch merge-kafka-python
git subtree add --squash --prefix=kafka kafka-python-kafka

git-subtree-dir: tests/kafka
git-subtree-split: 1d17d3b7950b40aeeeef52281b8b7ab51622b272

Scenario (assumes kafka-python-master still exists from previous subtree add):
git switch kafka-python-master
git subtree split --prefix=test -b kafka-python-test
git switch merge-kafka-python
git subtree add --squash --prefix=tests/kafka kafka-python-test