dm-is-remixable does a non-standard method to lookup models.

[postmodern]

I noticed that dm-is-remixable searches for models at the top-level first. This differs from how dm-core resolves models, which begins searching in the current namespace upward.

# lib/dm-is-remixable/is/remixable.rb:60
remixable_module = case remixable
  when Symbol then Object.full_const_get(ActiveSupport::Inflector.    classify(remixable))
  when String then Object.full_const_get(remixable)
  when Module then remixable
end