-- | The stack's default VPC subnet ID. This parameter is required if you specify
-- a value for the 'VpcId' parameter. All instances are launched into this subnet
-- unless you specify otherwise when you create the instance. If you also
-- specify a value for 'DefaultAvailabilityZone', the subnet must be in that zone.
-- For information on default values and when this parameter is required, see
-- the 'VpcId' parameter description.
usDefaultSubnetId :: Lens' UpdateStack (Maybe Text)
usDefaultSubnetId =
    lens _usDefaultSubnetId (\s a -> s { _usDefaultSubnetId = a })
usDefaultSubnetId :: Lens' UpdateStack (Maybe Text)
usDefaultSubnetId =
    lens _usDefaultSubnetId (\s a -> s { _usDefaultSubnetId = a })
usDefaultSubnetId =
    lens _usDefaultSubnetId (\s a -> s { _usDefaultSubnetId = a })