How to typehint context in an IDE?

问题

I am using Closure::call (http://php.net/manual/en/closure.call.php) to call an external closure inside a class context.

Here's a simple repro:

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"

This works as expected, but my IDE is of course, not happy, and is warning me about the "field bar not found":

Can I somehow tell the IDE (in this case PhpStorm) that the closure is going to be used inside another class and that it should assume its context?