Why response comes over protocol http2.0 although i set for http1.1

[cihangir]

@brndnmtthws

For the HTTP/1, you should use ClientBulider::http1_only() instead of trying to set the version on a per-request basis (I'm not sure why that code is there, it seems to be ignored): ClientBuilder in reqwest - Rust

But there is something wrong when i try same for http2.0, for example when i want to use http2.0 and set http2_prior_knowledge to ClientBuilder it giving FRAME_SIZE_ERROR but instead when i set for per request as i did in my code its fine with that. I am little confused.