OpsWorks.Volume
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-opsworks-volume.html
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-opsworks-volume.html;
val make_properties :
ec2_volume_id:string ->
?mount_point:string ->
?name:string ->
stack_id:string ->
unit ->
properties
val yojson_of_properties :
properties ->
[> `Assoc of (string * Yojson.Safe.t) list ]
val create_attributes : string -> attributes