    # File lib/fog/aws/requests/auto_scaling/create_launch_configuration.rb, line 47
            def create_launch_configuration(image_id, instance_type, launch_configuration_name, options = {})
              if block_device_mappings = options.delete('BlockDeviceMappings')
                block_device_mappings.each_with_index do |mapping, i|
                  for key, value in mapping
                    options.merge!({ format("BlockDeviceMappings.member.%d.#{key}", i+1) => value })
                  end
                end
              end
              if security_groups = options.delete('SecurityGroups')
                 options.merge!(AWS.indexed_param('SecurityGroups.member.%d', [*security_groups]))
              end
              if options['UserData']
                options['UserData'] = Base64.encode64(options['UserData'])
              end
              request({
                'Action'                  => 'CreateLaunchConfiguration',
                'ImageId'                 => image_id,
                'InstanceType'            => instance_type,
                'LaunchConfigurationName' => launch_configuration_name,
                :parser                   => Fog::Parsers::AWS::AutoScaling::Basic.new
              }.merge!(options))
            end