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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2020 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy;
/**
* Abstraction around environment variables.
*/
interface EnvInterface
{
/**
* Get an environment variable by name.
*
* @return string|null
*/
public function get($key);
}