client.routeDatabase,
      client.newBuilder()
        .build()
        .routeDatabase,
    )
    assertSame(
      client.routeDatabase,
      client.newBuilder()
        .callTimeout(Duration.ofSeconds(5))
        .build()
        .routeDatabase,
    )

    // logically different scope of client for route db
    assertNotSame(
      client.routeDatabase,
      client.newBuilder()