def enable_groups_from_env!
      return if ENV['SQUIB_BUILD'].nil?
      ENV['SQUIB_BUILD'].split(',').each do |grp|
        enable_build grp.strip.to_sym
      end
    end
def enable_groups_from_env!
      return if ENV['SQUIB_BUILD'].nil?
      ENV['SQUIB_BUILD'].split(',').each do |grp|
        enable_build grp.strip.to_sym
      end
    end
Not a DSL method, but initialized from Deck.new