public IApiResult Update(UpdateDocument operation)
        {
            var result = operation.ExecuteAsync().Result;

            if (result is ValidationsOutput)
            {
                return(new ApiResult <List <ValidationItem> >()
                {
                    Data = ((ValidationsOutput)result).Errors
                });
            }
            else
            {
                return(new ApiResult <object>()
                {
                    Status = ApiResult <object> .ApiStatus.Success
                });
            }
        }