DeleteObjects is delegated to remove the given data (value -> []string) from the given bucket (key -> string).

FIXME: Use a list of string as prefix.

ListBucketObjects is delegated to list all the objects (name only) in the given bucket.

ListBucketObjectsDetails is delegated to list all the objects (details) in the given bucket.

ParseS3Path is delegated to return bucket name and filename of a given s3 path.