@Override
	public Address getAddress(long offset) {
		if (contains(offset)) {
			return new GenericAddress(this, offset);
		}
		return baseSpace.getAddress(offset);
	}
Get the {@link AddressSet} which corresponds to overlayed physical region which 
corresponds to the defined overlay regions within the overlay (i.e., overlay blocks).
@return defined regions within the overlay.  All addresses are overlay addresses.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/address/OverlayAddressSpace.java