@Override
	public Address findFirstAddressInCommon(AddressSetView set) {
		for (AddressRange rng : set) {
			ensureKnown(rng.getMinAddress(), rng.getMaxAddress());
			AddressSet ir = cache.intersectRange(rng.getMinAddress(), rng.getMaxAddress());
			if (ir != null) {
				return ir.getMinAddress();
			}
		}
		return null;
	}
{@inheritDoc}

If this method returns true, then the entire delegate has been loaded into the cache.
Ghidra/Debug/ProposedUtils/src/main/java/ghidra/program/model/address/CachedAddressSetView.java