/**
* Register foreign key schema supplied by database.
*
* @param string $name Foreign key name.
* @param mixed $schema Driver specific foreign key information schema.
* @return AbstractReference
*/
protected function registerReference($name, $schema)
{
$reference = $this->driver->referenceSchema($this, $name, $schema);
$this->dbReferences[$name] = clone $reference;
return $this->references[$name] = $reference;
}
