1   
 2   
 3   
 4   
 5   
 6  """ 
 7  defines declarations visitor class interface 
 8  """ 
 9   
11      """ 
12      declarations visitor interface 
13       
14      All functions within this class should be redefined in derived classes. 
15      """ 
18       
20          raise NotImplementedError() 
 21           
23          raise NotImplementedError() 
 24       
26          raise NotImplementedError() 
 27       
29          raise NotImplementedError() 
 30       
32          raise NotImplementedError() 
 33       
35          raise NotImplementedError() 
 36       
38          raise NotImplementedError() 
 39   
41          raise NotImplementedError() 
 42           
44          raise NotImplementedError() 
 45           
47          raise NotImplementedError() 
 48           
50          raise NotImplementedError() 
 51           
53          raise NotImplementedError() 
 54           
56          raise NotImplementedError() 
  57