private static void logObjectState(string carObjName, ICar carObj)
{
log.AppendLine(IDENTATION_LEVEL, $"\t{carObjName}: {carObj.GetType().Name}");
IEngine engine = carObj.GetEngine();
string engineDescription = engine.GetDescription();
IShift shift = carObj.GetShift();
string shiftDescription = shift.GetDescription();
log.AppendLine(IDENTATION_LEVEL, $"\t\tEngine = {engineDescription}");
log.AppendLine(IDENTATION_LEVEL, $"\t\tShift = {shiftDescription}");
}