code: public function beginTransaction() : bool
      {
          if ($this->isConnected() === false) {
              $this->connect();
          }
          ++$this->transactionLevel;
          if ($this->transactionLevel == 1) {
              return $this->providerDatabase->beginTransaction($this->GetMasterLink());
          }
  
          return $this->providerDatabase->savePoint($this->GetMasterLink(), 'LEVEL' . ($this->transactionLevel - 1));
      }
docs: Begin transaction or create a new save point if already transactionning.
  
  @return bool true if successful