// EvalRetentionBypassFn validates input objInfo and GetObjectInfo error and returns an error if retention bypass is not allowed.
type EvalRetentionBypassFn func(o ObjectInfo, gerr error) error

// GetObjectInfoFn is the signature of GetObjectInfo function.
type GetObjectInfoFn func(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error)

// WalkVersionsSortOrder represents the sort order in which versions of an