/// <summary>
 /// A synchronous version of <see cref="INfieldSurveysService.SamplingPointImageAddAsync(string, string, string, byte[])"/>
 /// </summary>
 public static void SamplingPointImageAdd(this INfieldSurveysService surveysService, string surveyId, string samplingPointId, string filename, byte[] content)
 {
     surveysService.SamplingPointImageAddAsync(surveyId, samplingPointId, filename, content).Wait();
 }
 /// <summary>
 /// A synchronous version of <see cref="INfieldSurveysService.SamplingPointImageAddAsync(string, string, string)"/>
 /// </summary>
 public static void SamplingPointImageAdd(this INfieldSurveysService surveysService, string surveyId, string samplingPointId, string filePath)
 {
     surveysService.SamplingPointImageAddAsync(surveyId, samplingPointId, filePath).Wait();
 }