code: def inspect_functions(self):
          
          if not self._inspect_functions:
              d = {}
              for m in self.inspect_members:
                  if issubclass(m, AWSHelperFn):
                      d[m.__name__] = m
  
              TemplateGenerator._inspect_functions = d
  
          return self._inspect_functions
docs: Returns a map of `FunctionName: FunctionClass`