createGroupCallback(group, callback, callbackContext)
Sets a callback to be fired any time this Body impacts with the given Group. The impact test is performed against shape.collisionGroup values.The callback will be sent 4 parameters: This body, the body that impacted, the Shape in this body and the shape in the impacting body.This callback will only fire if this Body has been assigned a collision group.Note that the impact event happens after collision resolution, so it cannot be used to pr