@Override
	public AddressRange getRangeContaining(Address address) {
		ensureKnown(address, address);
		return cache.getRangeContaining(address);
	}
{@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