public function loadPlugins($_) {
		$arguments = func_get_args();
		foreach ($arguments as $possiblePackage) {
			if (FALSE === is_array($possiblePackage)) {
				$this->plugins += $this->loadPluginsFromPackage($possiblePackage);
			} else {
				foreach ($possiblePackage as $package) {
					$this->plugins += $this->loadPluginsFromPackage($package);
				}
			}
		}
		return $this;
	}