$/**$

$*$ TODO: Retrieve an GasEngine bean and return it$.$

$*$ @return a GasEngine bean

$*/$

$$ public GasEngine getGasPoweredBean$()\{$

$$ return null;

$\}$

$/**$

$*$ TODO: Retrieve a NuclearEngine bean and return it$.$

$*$ @return a NuclearEngine bean

$*/$

$$ public NuclearEngine getNuclearPoweredBean$()\{$

$$ return null;

$\}$