<?php
$numbers = $objectWrappers->wrap($arrays->arrayOf($plugins->loadClass("java.lang.Object"), $arrays->arrayOf($plugins->loadClass("java.lang.Long"), 1, 2), $arrays->arrayOf($plugins->loadClass("java.lang.Long"), 3, 4), $arrays->arrayOf($plugins->loadClass("java.lang.Long"), 5, 6)));
// 将嵌套数组展平为单个列表,展平后的列表: [1, 2, 3, 4, 5, 6]
$numbers->flatMap(function ($it) use ($arrays) {
    return $arrays->toList($it);
})->forEach(function ($it) use ($console) {
    $console->log($it);
});