class EventNotImplemented(NotImplementedError):
  """Special exception type for non-implemented events."""

@@ -45,13 +45,20 @@
 r):%0A
+  
   %22%22%22
+%0A    
 Spec
@@ -103,12 +103,152 @@
  events.
-%22%22%22
+%0A    %22%22%22%0A    pass%0A%0Aclass LoopError(Exception):%0A    %22%22%22%0A    Exception raised when send function called at an inappropriate time%0A    %22%22%22%0A    pass
 %0A

Add LoopError