commits: 8fbe1f8409a0c0e4ce88a0c30bfc668b16c6903c

This data as json

sha	message	author_date	committer_date	raw_author	raw_committer	repo	author	committer
8fbe1f8409a0c0e4ce88a0c30bfc668b16c6903c	Type check sentinel values (#3472) * type check sentinel values, using Enum pattern * Code review * Code review * Code review * Code review	2019-10-31T15:52:01Z	2019-10-31T15:52:01Z	279c587273ec459ffb5192e60bf8447c05601fa5	2ff6d9e74ee03928d143f0bb1557924a28d3b23d	13221727	5635139	6213168