# File lib/fog/aws/models/compute/subnet.rb, line 49
        def save
          requires :vpc_id, :cidr_block
          options = {}
          options['AvailabilityZone'] = availability_zone if availability_zone
          data = service.create_subnet(vpc_id, cidr_block, options).body['subnet']
          new_attributes = data.reject {|key,value| key == 'requestId'}
          merge_attributes(new_attributes)
          true

          true
        end