module AWS::AutoScaling::GroupOptions

def group_options options
  group_opts = {}
  group_opts[:launch_configuration_name] = launch_config_opt(options) if
    options.key?(:launch_configuration)
  group_opts[:availability_zones] = az_opt(options) if
    options.key?(:availability_zones)
  group_opts[:vpc_zone_identifier] = subnets_opt(options) if
    options.key?(:subnets)
  group_opts[:health_check_type] = health_check_type_opt(options) if
    options.key?(:health_check_type)
  group_opts[:tags] = tags_opt(options) if
    options.key?(:tags)
  [ 
    :min_size,
    :max_size,
    :default_cooldown, 
    :desired_capacity, 
    :health_check_grace_period,
    :placement_group,
  ].each do |opt|
    group_opts[opt] = options[opt] if options.key?(opt)
  end
  group_opts
end