private function summarizeBlock($block)
	{
		$block = array(
			'rules' => is_array($block) ? $block : $this->splitIntoRules(trim($block)),
			'count' => 0
		);
		foreach ($block['rules'] as $key => $rule) {
			$block['rules'][$key] = array(
				'rule'  => $rule,
				'count' => $this->countSelectorsInRule($rule),
			);
			$block['count'] += $block['rules'][$key]['count'];
		}

		return $block;
	}