code: func (o *OutgoingCallerIDService) Delete(ctx context.Context, sid string) error {
  	return o.client.DeleteResource(ctx, callerIDPathPart, sid)
  }
docs: // Delete the Caller ID with the given sid. If the ID has already been deleted,
  // or does not exist, Delete returns nil. If another error or a timeout occurs,
  // the error is returned.