Interface of services to manage items (of any kind) that can be grouped (by any manner).
An example of use can be find under (https://github.com/phpfacile/group-by-tags).
At the root of your project type
composer require phpfacile/group
Or add "phpfacile/group": "^1.0" to the "require" part of your composer.json file
"require": {
"phpfacile/group": "^1.0"
}