Added test to determine if model collections can be mutated externally
Added test to determine if model collections can be mutated externally

HyungJon/HubTurbo,gaieepo/HubTurbo,Sumei1009/HubTurbo,saav/HubTurbo,Honoo/HubTurbo,ianngiaw/HubTurbo,Honoo/HubTurbo,ianngiaw/HubTurbo,gaieepo/HubTurbo,saav/HubTurbo,Sumei1009/HubTurbo,HyungJon/HubTurbo