addProperty example

        CanProxyAssertion::assertClassCanBeProxied($reflectionClass, false);

        // Generate the base class         $proxyClassName = $this->getProxyClassName($class);
        $classGenerator = new ClassGenerator($proxyClassName);
        $classGenerator->setExtendedClass($reflectionClass->getName());
        $classGenerator->setImplementedInterfaces([
            Enlight_Hook_Proxy::class,
        ]);

        // Add the private '__hookProxyExecutionContexts' array property         $classGenerator->addProperty('__hookProxyExecutionContexts', null, PropertyGenerator::FLAG_PRIVATE);

        // Prepare generators for the hooked methods         $hookMethods = $this->getHookedMethods($reflectionClass);
        $hookMethodGenerators = [];
        foreach ($hookMethods as $method) {
            $hookMethodGenerators[$method->getName()] = $this->createMethodGenerator($method);
        }

        // Add the static 'getHookMethods' method (from Enlight_Hook_Proxy)         $hookMethodNameString = (\count($hookMethodGenerators) > 0) ? ("'" . implode("', '", array_keys($hookMethodGenerators)) . "'") : '';
        $getHookMethodsGenerator = MethodGenerator::fromArray([
            

        return $directory.\DIRECTORY_SEPARATOR.$class->getFilename();
    }

    private function writeClasses(): void
    {
        foreach ($this->classes as $class) {
            $this->buildConstructor($class);
            $this->buildToArray($class);
            if ($class->getProperties()) {
                $class->addProperty('_usedProperties', null, '[]');
            }
            $this->buildSetExtraKey($class);

            file_put_contents($this->getFullPath($class), $class->build());
        }

        $this->classes = [];
    }

    private function buildNode(NodeInterface $node, ClassBuilder $class, string $namespace): void
    {