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/vendor/symfony/dependency-injection/ -> ServiceSubscriberInterface.php (summary)

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Defines 1 class

ServiceSubscriberInterface:: (1 method):
  getSubscribedServices()


Interface: ServiceSubscriberInterface  - X-Ref

A ServiceSubscriber exposes its dependencies via the static {@link getSubscribedServices} method.

The getSubscribedServices method returns an array of service types required by such instances,
optionally keyed by the service names used internally. Service types that start with an interrogation
mark "?" are optional, while the other ones are mandatory service dependencies.

The injected service locators SHOULD NOT allow access to any other services not specified by the method.

It is expected that ServiceSubscriber instances consume PSR-11-based service locators internally.
This interface does not dictate any injection method for these service locators, although constructor
injection is recommended.

getSubscribedServices()   X-Ref
Returns an array of service types required by such instances, optionally keyed by the service names used internally.

For mandatory dependencies:

* ['logger' => 'Psr\Log\LoggerInterface'] means the objects use the "logger" name
internally to fetch a service which must implement Psr\Log\LoggerInterface.
* ['Psr\Log\LoggerInterface'] is a shortcut for
* ['Psr\Log\LoggerInterface' => 'Psr\Log\LoggerInterface']

otherwise:

* ['logger' => '?Psr\Log\LoggerInterface'] denotes an optional dependency
* ['?Psr\Log\LoggerInterface'] is a shortcut for
* ['Psr\Log\LoggerInterface' => '?Psr\Log\LoggerInterface']

return: array The required service types, optionally keyed by service names


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