Gc\Tab\Model::getDocumentType PHP Method

    public function getDocumentType()
    {
        if ($this->getData('document_type') === null) {
            $this->setData('document_type', \Gc\DocumentType\Model::fromId($this->getDocumentTypeId()));
        }
        return $this->getData('document_type');
    }

 /**
  * Test
  *
  * @return void
  */
 public function testGetDocumentType()
 {
     $this->assertInstanceOf('Gc\\DocumentType\\Model', $this->object->getDocumentType());
 }