ContainerInterface.php
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ContainerInterface.php
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	<?php

	declare(strict_types=1);

	namespace Psr\Container;

	/**
	* Describes the interface of a container that exposes methods to read its entries.
	*/
	interface ContainerInterface
	{
	/**
	* Finds an entry of the container by its identifier and returns it.
	*
	* @param string $id Identifier of the entry to look for.
	*
	* @throws NotFoundExceptionInterface No entry was found for this identifier.
	* @throws ContainerExceptionInterface Error while retrieving the entry.
	*
	* @return mixed Entry.
	*/
	public function get(string $id);

	/**
	* Returns true if the container can return an entry for the given identifier.
	* Returns false otherwise.
	*
	* `has($id)` returning true does not mean that `get($id)` will not throw an exception.
	* It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`.
	*
	* @param string $id Identifier of the entry to look for.
	*
	* @return bool
	*/
	public function has(string $id);
	}