The devs want a feature flag in the code to temporarily hide unfinished pieces of code that are related to merging sub-refs. This would behave very much like a git branch. The devs can hide unfinished code behind this feature flag for a few days (not longer). Any chunk of code can easily be pulled out of the feature flag the moment the team agrees that chunk of code is ready to be deployed to dewiki.
This feature flag is only meant to be used on dev machines, not in production.