How does LUSID manage "fund of funds" portfolios?

How does LUSID manage the scenario where a portfolio owns "shares" in another portfolio?

In LUSID, a Portfolio can be "securitised" - i.e. it can associated with a bespoke instrument so that it can be purchased by a parent portfolio. The scope and portfolio code needs to be specified as inputs into the instrument creation API call (see https://docs.lusid.com/#operation/UpsertInstruments).

FoF Portfolio