
* Revert "unnecessary this in field initializers (#22522)" This reverts commit 5de96bb7341c521f7a6a3dec8cf24628aa1aa3e7. * Revert "Use unsafePackageSerialization when running tests (#22407)" This reverts commit 4bd6ad73954e42a98003a6e23502df0487ff5dfd. * Revert "Roll engine f6af1f20ba92..b59c86493159 (3 commits) (#22538)" This reverts commit 85a4591aa329a4c304063ea3d54d2bd742b29836.