Repo is the URI of the repository containing this source unit, if any. The scanner tool does not need to set this field - it can be left blank, to be filled in by the `srclib` tool.

If Repo is empty, it indicates that the repository URI is purposefully omitted and this field should be treated as if it doesn't exist. If Repo is set to the unresolved repo sentinel value, then it indicates that repository is unknown, but this field value can be used.

Repo is referenced in 3 repositories sourcegraph/srclib