fetch/fetch.go
func (p ContinueRequestParams) WithPostData(postData string) *ContinueRequestParams {
	p.PostData = postData
	return &p
}
func (p ContinueRequestParams) WithPostData(postData string) *ContinueRequestParams {
	p.PostData = postData
	return &p
}
// WithPostData if set, overrides the post data in the request.