protected Reader reader(Path path) throws IOException {
        return Files.newBufferedReader(path, StandardCharsets.UTF_8);
    }
Retrieves the data with the given keys at the given Properties file.

@param path the file where the data resides
@param keys the keys whose values will be retrieved
@return the configuration data
clients/src/main/java/org/apache/kafka/common/config/provider/FileConfigProvider.java