@Override
	public int hashCode() {
		int result = 0;
		result += this.getClass().hashCode();
		result *= 31;
		result += unary.hashCode();
		return result;
	}
Base class for unary operators on PatternExpressions
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/expression/UnaryExpression.java