public void TurnOnGreen() { if (!IsPresent()) { return; } greenLight.TurnOn(); }
public void TurnOnRed() { if (!IsPresent()) { return; } redLight.TurnOn(); }
public void TurnOnYellow() { if (!IsPresent()) { return; } yellowLight.TurnOn(); }
public void TurnOnGreen() { if (!IsPresent()) { return; } greenLight.TurnOn(); }
public void TurnOnRed() { if (!IsPresent()) { return; } redLight.TurnOn(); }
public void TurnOnYellow() { if (!IsPresent()) { return; } yellowLight.TurnOn(); }