in src/request.rs [315:321]
fn eq(&self, other: &Self) -> bool {
// Ignore the other fields of Request for now because they are not used.
self.request_line == other.request_line
&& self.headers.content_length() == other.headers.content_length()
&& self.headers.expect() == other.headers.expect()
&& self.headers.chunked() == other.headers.chunked()
}