IoT.ThingGroupsee http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-iot-thinggroup.html
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-iot-thinggroup-attributepayload.html
see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-resource-tags.html
and thing_group_properties = {attribute_payload : attribute_payload option;thing_group_description : string option;}see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-iot-thinggroup-thinggroupproperties.html
type properties = {parent_group_name : string option;thing_group_name : string option;thing_group_properties : thing_group_properties option;query_string : string option;}see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-iot-thinggroup.html;
val make_properties :
?parent_group_name:string ->
?thing_group_name:string ->
?thing_group_properties:thing_group_properties ->
?query_string:string ->
?tags:tag list ->
unit ->
propertiesval make_attribute_payload :
?attributes_:string Stdlib__Map.Make(Stdlib.String).t ->
unit ->
attribute_payloadval make_tag : value:string -> key:string -> unit -> tagval make_thing_group_properties :
?attribute_payload:attribute_payload ->
?thing_group_description:string ->
unit ->
thing_group_propertiesval yojson_of_attribute_payload : attribute_payload -> Yojson.Safe.tval yojson_of_tag : tag -> [> `Assoc of (string * Yojson.Safe.t) list ]val yojson_of_thing_group_properties :
thing_group_properties ->
[> `Assoc of (string * Yojson.Safe.t) list ]val yojson_of_properties :
properties ->
[> `Assoc of (string * Yojson.Safe.t) list ]val create_attributes : string -> attributes