def _buildNamingScheme(self):
    source = max(filter(BackupSource.enabled, self.allSources()), key=BackupSource.maxCount)
    return self._buildDeleteScheme(source)
def _buildNamingScheme(self):
    source = max(filter(BackupSource.enabled, self.allSources()), key=BackupSource.maxCount)
    return self._buildDeleteScheme(source)