@Override
	public void printList(ParserWalker walker, ArrayList<Object> list)
			throws MemoryAccessException {
		list.add(walker.getParentHandle());
	}
A variable with its semantic (and printing) value equal to a fixed
mapping of its pattern
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/symbol/ValueSymbol.java