mageekguy\atoum\runner::addExtension PHP Method

    public function addExtension(extension $extension, extension\configuration $configuration = null)
    {
        if ($this->extensions->contains($extension) === false) {
            $extension->setRunner($this);
            $this->addObserver($extension);
        }
        $this->extensions->attach($extension, $configuration);
        return $this;
    }

 /**
  * @param runner $runner
  * @return $this
  */
 public function addToRunner(\mageekguy\atoum\runner $runner)
 {
     $runner->addExtension($this);
     return $this;
 }