Package or Function to find and access keys in a nested dicts

New to Julia
10

Sorry, I saw that there are two versions of the function, the second version
works fine.

I have added a check, if only one instance of the key_of_interrest is included in the Dict,
if this is the case the output is a scalar:

function _retrieve(dict, key_of_interest, output = []) # default value is an empty array
    for (key, value) in dict
        println("key: ", key, ", typeof(key): ", typeof(key))
        if key == key_of_interest
            push!(output, value)
        end
        if value isa AbstractDict
            _retrieve(value, key_of_interest, output)
        end
    end
    if size(output)[1] == 1
        output = output[]
    end
    return output
end