MongoCollection::getCollection PHP Method

    public function getCollection()
    {
        return $this->collection;
    }

 /**
  * Executes a batch of write operations
  *
  * @see http://php.net/manual/en/mongowritebatch.execute.php
  * @param array $writeOptions
  * @return array
  */
 public final function execute(array $writeOptions = [])
 {
     $writeOptions += $this->writeOptions;
     if (!count($this->items)) {
         return ['ok' => true];
     }
     if (isset($writeOptions['j'])) {
         trigger_error('j parameter is not supported', E_WARNING);
     }
     if (isset($writeOptions['fsync'])) {
         trigger_error('fsync parameter is not supported', E_WARNING);
     }
     $options['writeConcern'] = $this->createWriteConcernFromArray($writeOptions);
     if (isset($writeOptions['ordered'])) {
         $options['ordered'] = $writeOptions['ordered'];
     }
     $collection = $this->collection->getCollection();
     try {
         $result = $collection->BulkWrite($this->items, $options);
         $ok = 1.0;
     } catch (\MongoDB\Driver\Exception\BulkWriteException $e) {
         $result = $e->getWriteResult();
         $ok = 0.0;
     }
     if ($ok === 1.0) {
         $this->items = [];
     }
     return ['ok' => $ok, 'nInserted' => $result->getInsertedCount(), 'nMatched' => $result->getMatchedCount(), 'nModified' => $result->getModifiedCount(), 'nUpserted' => $result->getUpsertedCount(), 'nRemoved' => $result->getDeletedCount()];
 }