DEFAULT_PUBLISHER_GROUP_ORDER (Property Type 0x22) is a Track Property.
It is an enum indicating the publisher's preference for prioritizing Objects
from different groups within the
same subscription (see Section 7). The allowed values are Ascending (0x1) or
Descending (0x2). If an endpoint receives a value outside this range, it MUST
close the session with PROTOCOL_VIOLATION.
If omitted, the publisher's preference is Ascending (0x1).