Zend\Code\Generator\ClassGenerator::fromArray PHP Method

    public static function fromArray(array $array)
    {
        if (!isset($array['name'])) {
            throw new Exception\InvalidArgumentException('Class generator requires that a name is provided for this object');
        }
        $cg = new static($array['name']);
        foreach ($array as $name => $value) {
            // normalize key
            switch (strtolower(str_replace(['.', '-', '_'], '', $name))) {
                case 'containingfile':
                    $cg->setContainingFileGenerator($value);
                    break;
                case 'namespacename':
                    $cg->setNamespaceName($value);
                    break;
                case 'docblock':
                    $docBlock = $value instanceof DocBlockGenerator ? $value : DocBlockGenerator::fromArray($value);
                    $cg->setDocBlock($docBlock);
                    break;
                case 'flags':
                    $cg->setFlags($value);
                    break;
                case 'extendedclass':
                    $cg->setExtendedClass($value);
                    break;
                case 'implementedinterfaces':
                    $cg->setImplementedInterfaces($value);
                    break;
                case 'properties':
                    $cg->addProperties($value);
                    break;
                case 'methods':
                    $cg->addMethods($value);
                    break;
            }
        }
        return $cg;
    }

 /**
  * {@inheritdoc}
  */
 public function visit(Entity $entity)
 {
     $name = $entity->getName();
     $namespace = $entity->getNamespace();
     $shortDescription = 'Protobuf extension : ' . $entity->getClass();
     $class = ClassGenerator::fromArray(['name' => $name, 'namespacename' => $namespace, 'implementedinterfaces' => ['\\Protobuf\\Extension'], 'properties' => $this->generateFields($entity), 'methods' => $this->generateMethods($entity), 'docblock' => ['shortDescription' => $shortDescription]]);
     $entity->setContent($this->generateFileContent($class, $entity));
 }