code: def parse_method_configs(interface_config):
      
      # Grab all the retry codes
      retry_codes_map = {
          name: retry_codes
          for name, retry_codes in six.iteritems(interface_config.get("retry_codes", {}))
      }
  
      # Grab all of the retry params
      retry_params_map = {
          name: retry_params
          for name, retry_params in six.iteritems(
              interface_config.get("retry_params", {})
          )
      }
  
      # Iterate through all the API methods and create a flat MethodConfig
      # instance for each one.
      method_configs = {}
  
      for method_name, method_params in six.iteritems(
          interface_config.get("methods", {})
      ):
          retry_params_name = method_params.get("retry_params_name")
  
          if retry_params_name is not None:
              retry_params = retry_params_map[retry_params_name]
              retry_ = _retry_from_retry_config(
                  retry_params, retry_codes_map[method_params["retry_codes_name"]]
              )
              timeout_ = _timeout_from_retry_config(retry_params)
  
          # No retry config, so this is a non-retryable method.
          else:
              retry_ = None
              timeout_ = timeout.ConstantTimeout(
                  method_params["timeout_millis"] / _MILLIS_PER_SECOND
              )
  
          method_configs[method_name] = MethodConfig(retry=retry_, timeout=timeout_)
  
      return method_configs
docs: Creates default retry and timeout objects for each method in a gapic
      interface config.
  
      Args:
          interface_config (Mapping): The interface config section of the full
              gapic library config. For example, If the full configuration has
              an interface named ``google.example.v1.ExampleService`` you would
              pass in just that interface's configuration, for example
              ``gapic_config['interfaces']['google.example.v1.ExampleService']``.
  
      Returns:
          Mapping[str, MethodConfig]: A mapping of RPC method names to their
              configuration.