src/Collection.php
public function getTopLevelWindow()
    {
        foreach ($this->objects as $object) {
            if ($object instanceof Frame
            or $object instanceof Dialog) {
                return $object;
            }
        }
    }
public function getTopLevelWindow()
    {
        foreach ($this->objects as $object) {
            if ($object instanceof Frame
            or $object instanceof Dialog) {
                return $object;
            }
        }
    }
Get the top-level window element

@return ElementInterface