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<?php
/**
* This file is part of the ramsey/collection library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Collection;
use Ramsey\Collection\Exception\CollectionMismatchException;
use Ramsey\Collection\Exception\InvalidArgumentException;
use Ramsey\Collection\Exception\InvalidPropertyOrMethod;
use Ramsey\Collection\Exception\NoSuchElementException;
use Ramsey\Collection\Exception\UnsupportedOperationException;
/**
* A collection represents a group of values, known as its elements.
*
* Some collections allow duplicate elements and others do not. Some are ordered
* and others unordered.
*
* @template T
* @extends ArrayInterface<T>
*/
interface CollectionInterface extends ArrayInterface
{
/**
* Ensures that this collection contains the specified element (optional
* operation).
*
* Returns `true` if this collection changed as a result of the call.
* (Returns `false` if this collection does not permit duplicates and
* already contains the specified element.)
*
* Collections that support this operation may place limitations on what
* elements may be added to this collection. In particular, some
* collections will refuse to add `null` elements, and others will impose
* restrictions on the type of elements that may be added. Collection
 
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