Hi,

I found a bug related to the Iterator interface and its methods (next, current, ...)

<?php
    namespace Devsense\Builtin;

    class Test implements \Iterator
    {
        /**
         * @var static[]
         */
        public array $datas = [];

        /**
         * @var int
         */
        protected int $_position = 0;


        public function rewind(): ?static
		{
            $this->_position = 0;
            return $this->current();
        }
    
        public function current(): ?static
        {
            return $this->datas[$this->_position] ?? null;
        }

        public function next(): ?static
		{
			$this->_position++;
            return $this->current();
		}

		public function key(): mixed
		{
			return $this->_position;
		}

		public function valid(): bool
		{
            return array_key_exists($this->_position, $this->datas);
        }

        public function test(): bool
        {
            return true;
        }
    }

    $test = new Test();

    $current = $test->current();
    $current->test();

    $next = $test->next();
    $next->test();

Got PHP0404 error on lines $current->test(); and $next->test();

FYI: https://www.php.net/manual/en/language.oop5.variance.php

Covariance allows a child's method to return a more specific type than the return type of its parent's method.

Thank you for the fix.