func (c *ConferenceService) GetNextConferencesInRange(start time.Time, end time.Time, nextPageURI string) ConferencePageIterator {
	if nextPageURI == "" {
		panic("nextpageuri is empty")
	}
	iter := NewNextPageIterator(c.client, conferencePathPart)
	iter.SetNextPageURI(types.NullString{Valid: true, String: nextPageURI})
	return &conferenceDateIterator{
		start: start,
		end:   end,
		p:     iter,
	}
}
func (c *ConferenceService) GetNextConferencesInRange(start time.Time, end time.Time, nextPageURI string) ConferencePageIterator {
	if nextPageURI == "" {
		panic("nextpageuri is empty")
	}
	iter := NewNextPageIterator(c.client, conferencePathPart)
	iter.SetNextPageURI(types.NullString{Valid: true, String: nextPageURI})
	return &conferenceDateIterator{
		start: start,
		end:   end,
		p:     iter,
	}
}
// GetNextConferencesInRange retrieves the page at the nextPageURI and continues
// retrieving pages until any results are found in the range given by start or
// end, or we determine there are no more records to be found in that range.
//
// If ConferencePage is non-nil, it will have at least one result.