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About this Add-on
First expiration step may take some time and blocks UI during that time, next ones will be much smaller and should not create any issue.
Warning: the Places expiration system works to provide you the best performances in an automatic way. Using this add-on to override its functionality, may create unexpected performance problems and is not needed. Thus, unless you have clear reasons to need the functionality exposed by this add-on, you should not use it.