/// <summary>
 /// Call FHIRbase function and cast value
 /// </summary>
 /// <typeparam name="T"></typeparam>
 /// <param name="func"></param>
 /// <returns></returns>
 public T Cast <T>()
 {
     return((T)PostgresHelper.Function(this.ConnectionString, this._name, this._parameters.ToArray()));
 }