lib/learn_open/environments.rb in learn-open-1.2.21 vs lib/learn_open/environments.rb in learn-open-1.2.22

@@ -29,7 +29,10 @@
     end
 
     def self.on_linux?(platform)
       !!platform.match(/linux/)
     end
+
+    class UnknownLessonDownloadError < StandardError
+    end
   end
 end