| public static implementsInterface ( $value, $interface, $message = '' ) |
/**
* @param PromotionSubjectInterface $subject
*
* @return bool
*/
protected function isSubjectValid(PromotionSubjectInterface $subject)
{
Assert::implementsInterface($subject, OrderInterface::class);
return 0 !== $subject->countItems();
}
/**
* {@inheritDoc}
*/
public function registerTagHandler($tagName, $handler)
{
Assert::stringNotEmpty($tagName);
Assert::stringNotEmpty($handler);
Assert::classExists($handler);
Assert::implementsInterface($handler, StaticMethod::class);
if (strpos($tagName, '\\') && $tagName[0] !== '\\') {
throw new \InvalidArgumentException('A namespaced tag must have a leading backslash as it must be fully qualified');
}
$this->tagHandlerMappings[$tagName] = $handler;
}
