Item group model.
| Name | Type | Description |
|---|---|---|
| child_count | Int64 | Number of nested child groups. |
| id | Int64 | Group ID in the system. |
| last_update | Int64 | Last record update date as Unix time in seconds. |
| name | String | Item group name. |
| parent_id | Int64 | Parent group ID. |
| path | String | Group path. Nested groups are separated by slash. |