docs: def get_checksum(self):
          """
          Returns a checksum based on the IDL that ignores comments and 
          ordering, but detects changes to types, parameter order, 
          and enum values.
          """
          arr = [ ]
          for elem in self.parsed:
              s = elem_checksum(elem)
              if s:
                  arr.append(s)
          arr.sort()
          #print arr
          return md5(json.dumps(arr))