Container interface
  ==============
  
  This repository holds all interfaces related to [PSR-11 (Container Interface)][psr-url].
  
  Note that this is not a Container implementation of its own. It is merely abstractions that describe the components of a Dependency Injection Container.
  
  The installable [package][package-url] and [implementations][implementation-url] are listed on Packagist.
  
  [psr-url]: https://www.php-fig.org/psr/psr-11/
  [package-url]: https://packagist.org/packages/psr/container
  [implementation-url]: https://packagist.org/providers/psr/container-implementation