<?php
$s = $sequences->sequenceOf(1, 2, 3);
$ms = $sequences->toMutableSet($s);
// 可变 Set 可以修改
$ms->add(4);
$ms->add(5);
$ms->add(6);
$objectWrappers->wrap($ms)->forEach(function ($it) use ($console) {
    $console->log($it);
});