code: def generate_client_callers(spec, timeout, error_callback, local, app):
      
  
      callers_dict = {}
  
      def mycallback(endpoint):
          if not endpoint.handler_client:
              return
  
          callers_dict[endpoint.handler_client] = _generate_client_caller(spec, endpoint, timeout, error_callback, local, app)
  
      spec.call_on_each_endpoint(mycallback)
  
      return callers_dict
docs: Return a dict mapping method names to anonymous functions that
      will call the server's endpoint of the corresponding name as
      described in the api defined by the swagger dict and bravado spec