implemented .count(), .isEmpty(), .removeAll()#42

Merged

vaind merged 2 commits intoobjectbox:devfrom

liquidiert:master

Oct 21, 2019

Commits on Oct 20, 2019

implemented .count(), .isEmpty(), .removeAll(); ready for PR
liquidiert
committed

Commits on Oct 21, 2019

added .remove(), .removeMany() methods and seperate unit tests
liquidiert
committed