@Override
	public String print(ParserWalker walker) throws MemoryAccessException {
		long val = walker.getAddr().getOffset();
		return "0x" + Long.toHexString(val);
	}
TripleSymbol with semantic value equal to offset of instruction's
current address
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/symbol/StartSymbol.java