func writeSuccessResponseJSON(w http.ResponseWriter, response []byte) {
	writeResponse(w, http.StatusOK, response, mimeJSON)
}

// writeSuccessResponseXML writes success headers and response if any,
// with content-type set to `application/xml`.
func writeSuccessResponseXML(w http.ResponseWriter, response []byte) {
	writeResponse(w, http.StatusOK, response, mimeXML)
}