@Override
	public synchronized long getAbsoluteEncoding(Address addr, boolean create) {
		if (useOldAddrMap) {
			return oldAddrMap.getAbsoluteEncoding(addr, create);
		}
		return encodeAbsolute(addr, create ? INDEX_CREATE : INDEX_MATCH);
	}
Returns an address map which may be used during the upgrade of old address
encodings.  If the address map is up-to-date, then this method will return
this instance of AddressMapDB.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/map/AddressMapDB.java