@Override
	public Address getAddress(String addrString, boolean caseSensitive)
			throws AddressFormatException {
		String offStr = addrString;

		int colonPos = addrString.lastIndexOf(Address.SEPARATOR);
		if (colonPos >= 0) {
			String addrSpaceStr = addrString.substring(0, colonPos);
			if (!StringUtilities.equals(getName(), addrSpaceStr, caseSensitive)) {
				return null;
			}
			offStr = addrString.substring(colonPos + 1);
		}

		try {
			long off = parseString(offStr);
			return getAddressInThisSpaceOnly(off);
		}
		catch (NumberFormatException e) {
			throw new AddressFormatException(addrString + " contains invalid address hex offset");
		}
		catch (AddressOutOfBoundsException e) {
			throw new AddressFormatException(e.getMessage());
		}
	}
Returns the unique id value for this space.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/address/AbstractAddressSpace.java