/**
* Check if specified version of resource exists. If not - exception is thrown.
*
* @param string $resourceName
* @param string $resourceVersion
* @throws RuntimeException When resource does not exist.
*/
protected function _checkIfResourceVersionExists($resourceName, $resourceVersion)
{
if (!isset($this->_data['resources'][$resourceName])) {
throw new RuntimeException($this->_helper->__('Unknown resource "%s".', $resourceName));
}
if (!isset($this->_data['resources'][$resourceName]['versions'][$resourceVersion])) {
throw new RuntimeException($this->_helper->__('Unknown version "%s" for resource "%s".', $resourceVersion, $resourceName));
}
}