hehe.org/vendor/symfony/contracts/EventDispatcher/composer.json

{
    "name": "symfony/event-dispatcher-contracts",
    "type": "library",
    "description": "Generic abstractions related to dispatching event",
    "keywords": ["abstractions", "contracts", "decoupling", "interfaces", "interoperability", "standards"],
    "homepage": "https://symfony.com",
    "license": "MIT",
    "authors": [
        {
            "name": "Nicolas Grekas",
            "email": "p@tchwork.com"
        },
        {
            "name": "Symfony Community",
            "homepage": "https://symfony.com/contributors"
        }
    ],
    "require": {
        "php": "^7.1.3"
    },
    "suggest": {
        "psr/event-dispatcher": "",
        "symfony/event-dispatcher-implementation": ""
    },
    "autoload": {
        "psr-4": { "Symfony\\Contracts\\EventDispatcher\\": "" }
    },
    "minimum-stability": "dev",
    "extra": {
        "branch-alias": {
            "dev-master": "1.1-dev"
        }
    }
}