Base::measure

public function measure()
{
	$this
		->purify()
		->measureEntity()
		->measureFiles();

	if ($this instanceof Volume\IVolumeClearActivity || is_callable([$this, 'measureActivity']))
	{
		$this->measureActivity();
	}

	if ($this instanceof Volume\IVolumeClearEvent || is_callable([$this, 'measureEvent']))
	{
		$this->measureEvent();
	}

	return $this;
}