private String toUnaryTermExpression(Field field, TypeReference fieldType, UnaryTerm unaryTerm, List<Argument> parserArguments, List<Argument> serializerArguments, boolean serialize, Tracer tracer) {
        tracer = tracer.dive("unary term instanceOf");
        Term a = unaryTerm.getA();
        switch (unaryTerm.getOperation()) {
            case "!":
                // Not
                // !x
                // => "!(" + toExpression(field, fieldType, a, parserArguments, serializerArguments, serialize, false) + ")"
                tracer = tracer.dive("case !");
                return tracer + "!(" + toExpression(field, fieldType, a, parserArguments, serializerArguments, serialize, false) + ")";
            case "-":
                // Negate
                // -x
                // => "-(" + toExpression(field, fieldType, a, parserArguments, serializerArguments, serialize, false) + ")"
                tracer =tracer.dive("case -");
                return tracer + "-(" + toExpression(field, fieldType, a, parserArguments, serializerArguments, serialize, false) + ")";
            case "()":
                // Identity
                // x()
                // => "(" + toExpression(field, fieldType, a, parserArguments, serializerArguments, serialize, false) + ")"
                tracer = tracer.dive("case ()");
                return tracer + "(" + toExpression(field, fieldType, a, parserArguments, serializerArguments, serialize, false) + ")";
            default:
                throw new FreemarkerException("Unsupported unary operation type " + unaryTerm.getOperation());
        }
    }
Returns a Python expression that represents the given unary term.

@param field the field of the given type reference
@param typeReference the type reference of the given data
@param unaryTerm the unary term to represent
@param parserArguments the parser arguments
@param serializerArguments the serializer arguments
@param serialize whether the data is serialized
@param tracer the tracer to use
@return a Python expression
code-generation/language-python/src/main/java/org/apache/plc4x/language/python/PythonLanguageTemplateHelper.java