Wire protocol the response actually came over, as reported by the native
transport for this response: 'h3' (HTTP/3 over QUIC), 'h2' (HTTP/2
over TCP) or 'http/1.1'. It is the path the request really took, which
can differ from the configured protocolMode: an iOS auto client whose
QUIC attempt does not get through answers 'h2'. Absent when nothing was
sent — responses produced by the render transport
(createHttpRenderTransportLayer) or by a test transport. Typed as the
transport's own string, so a value a newer transport adds passes through.
Wire protocol the response actually came over, as reported by the native transport for this response:
'h3'(HTTP/3 over QUIC),'h2'(HTTP/2 over TCP) or'http/1.1'. It is the path the request really took, which can differ from the configuredprotocolMode: an iOSautoclient whose QUIC attempt does not get through answers'h2'. Absent when nothing was sent — responses produced by the render transport (createHttpRenderTransportLayer) or by a test transport. Typed as the transport's ownstring, so a value a newer transport adds passes through.