Gc\Document\Model::getId PHP Method

    public function getId()
    {
        return $this->getData('id');
    }

 protected function createContent()
 {
     $this->view = ViewModel::fromArray(array('name' => 'View', 'identifier' => 'ViewContentIdentifier', 'description' => 'Description', 'content' => 'Content of the webpage <br/>This is my view'));
     $this->view->save();
     $this->layout = LayoutModel::fromArray(array('name' => 'Layout', 'identifier' => 'LayoutContentIdentifier', 'description' => 'Description', 'content' => '<?php echo $this->content; '));
     $this->layout->save();
     $this->script = ScriptModel::fromArray(array('name' => 'Script', 'identifier' => 'ScriptContentIdentifier', 'description' => 'Description', 'content' => ''));
     $this->script->save();
     $this->documentType = DocumentTypeModel::fromArray(array('name' => 'DocumentType', 'description' => 'description', 'icon_id' => 1, 'default_view_id' => $this->view->getId(), 'user_id' => $this->user->getId()));
     $this->documentType->save();
     $this->documentType->setDependencies(array($this->documentType->getId()));
     $this->documentType->addView($this->view->getId());
     $this->documentType->save();
     $this->datatype = DatatypeModel::fromArray(array('name' => 'DatatypeTest', 'model' => 'Textstring'));
     $this->datatype->save();
     $this->tabModel = TabModel::fromArray(array('name' => 'test', 'description' => 'test', 'document_type_id' => $this->documentType->getId()));
     $this->tabModel->save();
     $this->property = PropertyModel::fromArray(array('name' => 'test', 'identifier' => 'azd', 'description' => 'test', 'tab_id' => $this->tabModel->getId(), 'datatype_id' => $this->datatype->getId(), 'is_required' => true));
     $this->property->save();
     $this->document = DocumentModel::fromArray(array('name' => 'test', 'url_key' => '', 'status' => DocumentModel::STATUS_ENABLE, 'user_id' => $this->user->getId(), 'document_type_id' => $this->documentType->getId(), 'view_id' => $this->view->getId(), 'layout_id' => $this->layout->getId(), 'parent_id' => null));
     $this->document->save();
     $this->property->setDocumentId($this->document->getId());
     $this->property->setValue('string');
     $this->property->saveValue();
 }