/**
* @param $class
* @param $label
* @return \core_kernel_classes_Resource
*/
protected function instantiateClass($class, $label)
{
$instance = $this->itemsService->createInstance($class, $label);
$this->assertIsA($instance, 'core_kernel_classes_Resource');
$this->assertEquals($label, $instance->getLabel());
$this->assertTrue(defined('RDFS_LABEL'));
$instance->removePropertyValues(new \core_kernel_classes_Property(RDFS_LABEL));
$instance->setLabel($label);
$this->assertIsA($instance, 'core_kernel_classes_Resource');
$this->assertEquals($label, $instance->getLabel());
return $instance;
}