/// Represents the HTTP version used in the request or response.
#[derive(Debug, Clone, PartialEq, Eq)]pubenumHttpVersion{/// HTTP version 0.9
HTTP0_9,/// HTTP version 1.0
HTTP1_0,/// HTTP version 1.1
HTTP1_1,/// HTTP version 2.0
HTTP2,/// HTTP version 3.0
HTTP3,/// Unknown version
Unknown(String),}