-- | The version of this environment tier.
etVersion :: Lens' EnvironmentTier (Maybe Text)
etVersion = lens _etVersion (\s a -> s { _etVersion = a })
etVersion :: Lens' EnvironmentTier (Maybe Text)
etVersion = lens _etVersion (\s a -> s { _etVersion = a })
etVersion = lens _etVersion (\s a -> s { _etVersion = a })