protected UploadRequest(WopiRequestType requestType, string fileId, Stream requestStream) : base(requestType, fileId)
 {
     RequestStream = requestStream;
 }
 protected internal WopiRequest(WopiRequestType requestType)
 {
     RequestType = requestType;
 }
 protected FilesRequest(WopiRequestType requestType, string fileId) : base(requestType)
 {
     FileId = fileId;
 }