private static void addOperandTypeMapping(int opcodeLow, int opcodeHigh,
			DWARFExpressionOperandType... operandTypes) {
		for (int i = opcodeLow; i <= opcodeHigh; i++) {
			OPtoOperandTypes.put(i, operandTypes);
		}
	}
Map of opcode to its expected operand types.  If the opcode isn't found in this map,
it is assumed to not take any operands.
Even if Ghidra can't evaluate a DWARF opCode, we should still keep it in this
map so we can parse the expression and display it as a string.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/expression/DWARFExpressionOpCodes.java