ACLs are not even mentioned in the examples. Example needs to show both how to set a specific ACL and how to set a PredefinedAcl.

When I use this this code, the console Cloud Storage viewer does not show items as shared publicly:

storage.create(coverBlob, coverImage,
    BlobTargetOption.predefinedAcl(PredefinedAcl.PUBLIC_READ));

So it's not clear what this code is supposed to do.

Am I right to assume that ACL should be set on BlobInfo like this?

    .acl(Arrays.asList(Acl.of(User.ofAllUsers(), Role.READER)))

If this is correct, is it enough, or should be used together with BlobTargetOption.predefinedAcl(PredefinedAcl.PUBLIC_READ)?