[julia-users] how to tell if a jld file contains a dataset?

[Davide Lasagna]

I have read the available documentation but I cannot seem to get it.

How do I test whether an existing .jld file, opened  as

jldopen(filename, "r") do handle
    # test whether handle contains the dataset "foo"
end

contains a dataset, given its name as a string, e.g. "foo"?

Thanks!

Davide