public function enable()
    {
        $this->manager->enable($this);

        if ($this->referenced) {
            $this->manager->reference($this);
        }
    }
public function enable()
    {
        $this->manager->enable($this);

        if ($this->referenced) {
            $this->manager->reference($this);
        }
    }
public function enable ( ) { $ this -> manager -> enable ( $ this ) ; if ( $ this -> referenced ) { $ this -> manager -> reference ( $ this ) ; } }
Enables listening for signals to arrive.
Enables listening for signals to arrive .