public function setWrapIntoCollection($flag = true, $model = null, $primary = null) {
		$this->_wrapIntoCollection = (bool) $flag;
		
		if ($model !== null) {
			$this->_modelClass = (string) $model;
		}
		
		if ($primary !== null) {
			$this->_primary = (string) $primary;
		}
	}