public function trackMetric($category, array $options = [])
	{
		$item = "ga('send', 'event', '{$category}'";

		if (!empty($options)) {
			$item .= ", 'action', { ";

			foreach ($options as $key => $value) {
				$item .= "'{$key}': {$value}, ";
			}

			$item = rtrim($item, ', ') . " }";
		}

		$item .= ");";
		$this->addItem($item);
	}