src/Driver/Driver.php
protected function isolationLevel(string $level)
    {
        if (!empty($level)) {
            $this->isProfiling() && $this->getLogger()->info("Set transaction isolation level to '{$level}'");
            $this->execute("SET TRANSACTION ISOLATION LEVEL {$level}");
        }
    }
protected function isolationLevel(string $level)
    {
        if (!empty($level)) {
            $this->isProfiling() && $this->getLogger()->info("Set transaction isolation level to '{$level}'");
            $this->execute("SET TRANSACTION ISOLATION LEVEL {$level}");
        }
    }
protected function isolationLevel ( string $ level ) { if ( ! empty ( $ level ) ) { $ this -> isProfiling ( ) && $ this -> getLogger ( ) -> info ( "Set transaction isolation level to '{$level}'" ) ; $ this -> execute ( "SET TRANSACTION ISOLATION LEVEL {$level}" ) ; } }
Set transaction isolation level, this feature may not be supported by specific database
driver.

@param string $level
Set transaction isolation level this feature may not be supported by specific database driver .