system/Validation/Validation.php
protected function loadRuleSets()
	{
		if (empty($this->ruleSetFiles))
		{
			throw ValidationException::forNoRuleSets();
		}

		foreach ($this->ruleSetFiles as $file)
		{
			$this->ruleSetInstances[] = new $file();
		}
	}
protected function loadRuleSets()
	{
		if (empty($this->ruleSetFiles))
		{
			throw ValidationException::forNoRuleSets();
		}

		foreach ($this->ruleSetFiles as $file)
		{
			$this->ruleSetInstances[] = new $file();
		}
	}
Loads all of the rulesets classes that have been defined in the
Config\Validation and stores them locally so we can use them.