OptionalfetchFn: {Custom fetch implementation.
Optionalinit: RequestInitOptionalinit: RequestInitWhether to prefer HTTP/2 on Node.js.
OptionalsessionOptions: {HTTP/2 session pool options.
OptionaltransportOptions: Pick<FetchTransportOptions, "strict" | "onDroppedHeader">Header validation options (strict mode, dropped-header callback).
Create the appropriate transport for the current runtime. Each call returns a fresh transport — the Kinetex client owns the lifetime.