EC2.NetworkAcl
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-networkacl.html
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-resource-tags.html
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-networkacl.html;
val make_properties : vpc_id:string -> ?tags:tag list -> unit -> properties
val make_tag : value:string -> key:string -> unit -> tag
val yojson_of_tag : tag -> [> `Assoc of (string * Yojson.Safe.t) list ]
val yojson_of_properties :
properties ->
[> `Assoc of (string * Yojson.Safe.t) list ]
val create_attributes : string -> attributes