@Override
	public long getValue(ParserWalker walker) throws MemoryAccessException {
		Address addr = walker.getNaddr();
		return addr.getAddressableWordOffset();
	}
The integer offset of the address following the current instruction
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/expression/EndInstructionValue.java