Function span

packages/platform-node/test/HttpServer.test.ts:449–455

(name, parent, _, __, ___, kind)

        Effect.flatMap((r) => r.json),
        Effect.withTracer(Tracer.make({
          span(name, parent, _, __, ___, kind) {
            assert.strictEqual(name, "http.client GET")
            assert.strictEqual(kind, "client")
            assert(parent._tag === "Some" && parent.value._tag === "Span")
            assert.strictEqual(parent.value.name, "request parent")
            return requestSpan
          },
          context(f, _fiber) {
            return f()
          }