public function addModel(Mage_Core_Model_Abstract $model)
    {
        $modelInfo = Mage::getModel('sheep_debug/model');
        $modelInfo->init($model);
        $key = $modelInfo->getClass();

        if (!array_key_exists($key, $this->models)) {
            $this->models[$key] = $modelInfo;
        }

        $this->models[$key]->incrementCount();
    }