Throw an Exception in case of invalid asset group handles
Throw an Exception in case of invalid asset group handles

matt9mg/concrete5,MichaelMaar/concrete5,MichaelMaar/concrete5,avdevs/concrete5,avdevs/concrete5,matt9mg/concrete5,TimDix/concrete5,MichaelMaar/concrete5,avdevs/concrete5,matt9mg/concrete5,TimDix/concrete5,TimDix/concrete5