# File lib/aws/auto_scaling/group_options.rb, line 79
      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