1Closure add static
2-----
3<?php
4function () {
5    if (rand(0, 1)) {
6        return true;
7    }
8
9    return false;
10};
11-----
12$stmts[0]->expr->static = true;
13-----
14<?php
15static function () {
16    if (rand(0, 1)) {
17        return true;
18    }
19
20    return false;
21};