The refactor looks good, but Harbormaster reports unit test fails in:

• omnitools/tests/DateTime/DateStampTest.php
• omnitools/tests/Reflection/CodeClassTest.php

And fromUnixTime() changed from accepting a nullable/default argument to requiring an int, with now() replacing the no-argument usage.
Could you confirm all no-argument fromUnixTime() calls have been migrated, and fix or explain the failing unit tests?

For reference, to launch unit tests from Arcanist was broken as Xdebug was invoked without code coverage support.

https://github.com/nasqueron/arcanist/commit/2287f8768605272aba2544fa9f4192623f7d05ae fixed the issue.

As it changes the behavior of fromUnixTime, let's put this in 1.x series.