Just maybe he genuinely doesn't know what you mean. I mainly use Python and have no idea what you are talking about.
(You might consider reflecting on your tone and message. It presupposes bad faith on the other party, is dismissive and condescending, and you are probably less right than you think you are.)
(You might consider reflecting on your tone and message. It presupposes bad faith on the other party, is dismissive and condescending, and you are probably less right than you think you are.)