private function getSpecificSourceCacheKey($source, $context)
    {
        $source = str_replace('.', '_', $source);
        $context = str_replace('.', '_', $context);

        return $this->key . '.' . $source . '.' . $context;
    }
private function getSpecificSourceCacheKey($source, $context)
    {
        $source = str_replace('.', '_', $source);
        $context = str_replace('.', '_', $context);

        return $this->key . '.' . $source . '.' . $context;
    }
private function getSpecificSourceCacheKey ( $ source , $ context ) { $ source = str_replace ( '.' , '_' , $ source ) ; $ context = str_replace ( '.' , '_' , $ context ) ; return $ this -> key . '.' . $ source . '.' . $ context ; }
Get cache key given the source.

@param string $source  Source of comments
@param string $context Context of comment

@return string specific source cache key
Get cache key given the source .