$this->db = $db;
$this->tablesToClone = $tablesToClone;
$this->newTablePrefix = $newTablePrefix;
- $this->oldTablePrefix = $oldTablePrefix !== null ? $oldTablePrefix : $this->db->tablePrefix();
+ $this->oldTablePrefix = $oldTablePrefix ?? $this->db->tablePrefix();
$this->dropCurrentTables = $dropCurrentTables;
}