docs/models/tenancy/tenantgroup.md
Tenants can be organized by custom groups. For instance, you might create one group called "Customers" and one called "Departments." The assignment of a tenant to a group is optional.
Tenant groups may be nested recursively to achieve a multi-level hierarchy. For example, you might have a group called "Customers" containing subgroups of individual tenants grouped by product or account team.
A tenant group cannot be deleted if ungrouping its tenants, including those of any nested groups, would result in duplicate tenant names or slugs among ungrouped tenants.
The parent tenant group (if any).
A unique human-friendly name.
A unique URL-friendly identifier. (This value can be used for filtering.)