/**
 * The association extension.
 *
 * @param   AssociationExtensionInterface  $associationExtension  The extension
 *
 * @return  void
 *
 * @since  4.0.0
 */
public function setAssociationExtension(AssociationExtensionInterface $associationExtension)
{
    $this->associationExtension = $associationExtension;
}