/// <summary>
 /// Fetches all speaker details for given ids.
 /// </summary>
 /// <param name="speakerIds">The speaker ids</param>
 /// <returns>A list containing all speaker details</returns>
 public IEnumerable <Speaker> FetchSpeakerDetails(IEnumerable <string> speakerIds)
 {
     return(_speakersRepository.GetSpeakersById(speakerIds));
 }
 public Speakers GetSpeakerById(int id)
 {
     return(speakersRepository.GetSpeakersById(id));
 }