class Bundler::SpecSet

def spec_for_dependency(dep, match_current_platform)
  specs_for_platforms = lookup[dep.name]
  if match_current_platform
    Bundler.rubygems.platforms.reverse_each do |pl|
      match = GemHelpers.select_best_platform_match(specs_for_platforms, pl)
      return match if match
    end
    nil
  else
    GemHelpers.select_best_platform_match(specs_for_platforms, dep.__platform)
  end
end