How to use

getSourceId

method

in

mage.abilities.effects.common.CrewsVehicleSourceTriggeredAbility

@Override
public boolean checkTrigger(GameEvent event, Game game) {
  if (event.getTargetId().equals(getSourceId())) {
    for (Effect effect : getEffects()) {
      // set the vehicle id as target
      effect.setTargetPointer(new FixedTarget(event.getSourceId()));
    }
    return true;
  }
  return false;
}