# File lib/aws/ec2/availability_zone_collection.rb, line 26
      def each &block
        resp = filtered_request(:describe_availability_zones)
        resp.availability_zone_info.each do |az|
          zone = AvailabilityZone.new(az.zone_name,
            :region_name => az.region_name,
            :config => config)
          yield(zone)
        end
        nil
      end