Collection.php

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<?php
 
namespace SAML2\Utilities;
 
interface Collection extends \ArrayAccess, \Countable, \IteratorAggregate
{
    public function add($element);
 
    public function getOnlyElement();
 
    public function first();
 
    public function last();
 
    public function map(\Closure $function);
 
    public function filter(\Closure $filterFunction);
 
    public function get($key);
 
    public function remove($element);
 
    public function set($key, $value);
}