UNIT ENTERING VEHICLE

Fired as a unit is about to enter a vehicle, as compared to UNIT_ENTERED_VEHICLE which happens afterward.
 UNIT_ENTERING_VEHICLE: unitTarget, showVehicleFrame, isControlSeat, vehicleUIIndicatorID, vehicleGUID, mayChooseExit, hasPitch
==Payload==
:;unitTarget: : UnitId
:;showVehicleFrame:
:;isControlSeat:
:;vehicleUIIndicatorID:
:;vehicleGUID:
:;mayChooseExit:
:;hasPitch: