But it's not in the code you open sourced?
0.4-preview was an early version of 0.4 that still had some cruft like the feature flag you pointed out. We removed the cruft for the release of 0.4-beta
alt Hacker News
0.4-preview was an early version of 0.4 that still had some cruft like the feature flag you pointed out. We removed the cruft for the release of 0.4-beta