proxy: Proxy,
        ) {
          // Let request1 proceed to make a connection.
          latch1.countDown()
          try {
            // Wait until request1 makes the connection and puts it in the connection pool.
            latch2.await()
          } catch (e: InterruptedException) {
            throw AssertionError(e)
          }
        }

        override fun connectionAcquired(