@Override
	public AddressSetView getAddressSetView(Lifespan span, Predicate<T> predicate) {
		return new UnionAddressSetView(
			memSpaces.values().stream().map(m -> m.getAddressSetView(span, predicate)).toList());
	}
{@inheritDoc}

Note this counts entries in memory spaces only. No register spaces are included.
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/database/map/DBTraceAddressSnapRangePropertyMap.java