main/app/Persistence/ObjectManager.php
public function rollBack()
    {
        $this->assertIsSupported($this->supportsTransactions, __METHOD__);
        $this->wrapped->getConnection()->rollBack();
    }
public function rollBack()
    {
        $this->assertIsSupported($this->supportsTransactions, __METHOD__);
        $this->wrapped->getConnection()->rollBack();
    }
public function rollBack ( ) { $ this -> assertIsSupported ( $ this -> supportsTransactions , __METHOD__ ) ; $ this -> wrapped -> getConnection ( ) -> rollBack ( ) ; }
Rollbacks a transaction.

@throws UnsupportedMethodException if the method is not supported by
the underlying object manager
Rollbacks a transaction .