protected function loadConfiguration($version)
    {
        if (!$this->isVersionAvailable($version)) {
            throw new MigrationException('The requested YamlConfiguration was not available.', 1345822283);
        }

        $configuration = $this->yamlSourceImporter->load(substr($this->availableVersions[$version]['filePathAndName'], 0, -5));
        return $configuration;
    }