Why we can pass clients array to modifyGroup command?

[haladamateusz]

In createGroup command, we can pass only roles to assign them to specific group.

Somehow, with modifyGroup we can pass clients to the json. Is it a two-way binding? If attach group to client and then ask for this client with getClient command, will I get the group mentioned in modifyGroup command just a moment ago?

I thought client are top level entities and we cannot attach them to lower level entity, which is group in this case.

EDIT: same goes for textname and textdescription properties. Why we cannot define them during createGroup command?

EDIT2: textname and textdescription properties are present, but not described in readme.