'Implements interface.'

@classmethod
def validate_options(cls, options):

    if (not options.storage_s3_credentials):
        raise ValueError('--storage_s3_credentials    is    required.')
    if (not options.storage_s3_access_key_id):
        raise ValueError('--storage_s3_access_key_id    is    required.')
    if (not options.storage_s3_region):
        raise ValueError('--storage_s3_region    is    required.')
