There are APIs where ResponseAfter is not called

[katonium]

Hello, thank you for the useful SDK.
I think there may be some APIs where ResponseAfter is not called.

example 1: https://github.com/amzapi/selling-partner-api-sdk/blob/master/fees/api.gen.go#L179

func (c *Client) GetMyFeesEstimateForASIN(ctx context.Context, asin string, body GetMyFeesEstimateForASINJSONRequestBody) (*http.Response, error) {
	req, err := NewGetMyFeesEstimateForASINRequest(c.Endpoint, asin, body)
	if err != nil {
		return nil, err
	}
	req = req.WithContext(ctx)
	if c.RequestBefore != nil {
		err = c.RequestBefore(ctx, req)
		if err != nil {
			return nil, err
		}
	}
	return c.Client.Do(req)
}

example 2: https://github.com/amzapi/selling-partner-api-sdk/blob/master/fbaOutbound/api.gen.go#L373

func (c *Client) GetFulfillmentPreview(ctx context.Context, body GetFulfillmentPreviewJSONRequestBody) (*http.Response, error) {
	req, err := NewGetFulfillmentPreviewRequest(c.Endpoint, body)
	if err != nil {
		return nil, err
	}
	req = req.WithContext(ctx)
	if c.RequestBefore != nil {
		err = c.RequestBefore(ctx, req)
		if err != nil {
			return nil, err
		}
	}
	return c.Client.Do(req)
}

I don't know why this happens because I think the code is automatically generated, but I think these are not the your intended implementation.
Please let me know if there is anything I can do to help fix it.