How to detach a package without restarting

Question

Ref: docs for Pkg

I want to compare two methods with the same name from two different packages in the same session/script. To avoid name collision, I would like to negate using (i.e. "undo" / "reverse"). Something like what detach does for R.

using PackageOne
some_method()

undo using PackageOne  # <-- negate `using PackageOne` without restarting
using PackageTwo
some_method()  # name collision avoided here

Answer 1

You cannot detach a package that is already loaded in some module AFAICT. What you can do is wrap your code using these methods in a module like this:

module Test1
    using PackageOne
    some_method()
end

module Test2
    using PackageTwo
    some_method()
end

another approach would be:

using PackageOne
using PackageTwo

methods = [PackageOne.some_method, PackageTwo.some_method]

function test(some_method)
    # here use some_method
end

for method in methods
    test(method)
end