/**
* Delete all states that are not in configuration
*
* @return void
*/
protected function deleteNonexistentStates()
{
foreach ($this->stateCollection->getItems() as $state) {
/** @var \Magento\Indexer\Model\Indexer\State $state */
if (!isset($this->_data[$state->getIndexerId()])) {
$state->delete();
}
}
}
