public static bool TryGetValueStream <TValue>(
     this IProgrammingInterface api,
     ValueStreamIdentitfier <TValue> identifier,
     out IValueStream <TValue> invocator)
 {
     return(api.TryGetValueStream(identifier.Identifier, out invocator));
 }
 public static bool TryGetInvocator <TParameter, TResult>(
     this IProgrammingInterface api,
     FunctionIdentifier <TParameter, TResult> identifier,
     out IFunctionInvocator <TParameter, TResult> invocator)
 {
     return(api.TryGetInvocator(identifier.Identifier, out invocator));
 }