One racked plugin: what it is, whether it processes, and the last preset loaded into it.
true = passing through (still instantiated, still costing its latency).
true
The racked LV2 URI. Never empty — an empty position is not a slot, it is a shorter rack.
The last preset loaded here; '' = none since this plugin was racked.
''
One racked plugin: what it is, whether it processes, and the last preset loaded into it.