func (a *API) EnableExponentialBackoff() {
	a.useExponentialBackoffmu.Lock()
	a.useExponentialBackoff = true
	a.useExponentialBackoffmu.Unlock()
}
func (a *API) EnableExponentialBackoff() {
	a.useExponentialBackoffmu.Lock()
	a.useExponentialBackoff = true
	a.useExponentialBackoffmu.Unlock()
}
// EnableExponentialBackoff enables use of exponential backoff for next API call(s)
// and use exponential backoff for all API calls until exponential backoff is disabled.