https://github.com/puppetlabs/puppet/blob/045c19491b86f9793523c300ffc84140313c69b8/spec/unit/util/ldap/manager_spec.rb#L469 claims that it's not possible to stub a method and have it yield multiple different values, which is not true with current RSpec-mocks (or even ancient mocha). We should figure out what this test was trying to do that it needed the comment that was left behind.