如何在IDE中输入提示上下文？

我正在使用Closure::call(http://php.net/manual/en/closure.call.php)在类上下文中调用外部闭包.

这是一个简单的复制品:

class Foo {
    private $bar = 'baz';

    /**
     * Executes a closure in $this context and returns whatever the closure returns.
     *
     * @param \Closure $closure
     * @return mixed
     */
    public function callClosureInThisContext(\Closure $closure) {
        return $closure->call($this);
    }
}

class Closures {
    /**
     * @return \Closure
     */
    public function getClosureForFoo() : \Closure {
        return function () {
            // how do I tell my IDE that in this context $this is actually class Foo,
            // and not the class Closures?
            print $this->bar;
        };
    }
}

$foo = new Foo();
$closures = new Closures();
$foo->callClosureInThisContext($closures->getClosureForFoo()); // prints "baz"

这按预期工作,但我的IDE当然不高兴,并警告我" bar找不到字段":

我可以以某种方式告诉IDE(在本例中为PhpStorm),闭包将在另一个类中使用,并且它应该假设它的上下文？