when {
      newConnectionsNeeded > 0 -> state.scheduleOpener()
      newConnectionsNeeded < 0 -> scheduleCloser()
    }
  }

  /** Open connections to [address], if required by the address policy. */
  fun scheduleOpener(address: Address) {
    addressStates[address]?.scheduleOpener()
  }

  fun scheduleCloser() {
    cleanupQueue.schedule(cleanupTask)
  }

  /**

        connectionPool.scheduleOpener(route.address)
      } else if (allocationLimit > oldLimit) {
        // We might no longer need some connections
        connectionPool.scheduleCloser()
      }
    }
  }

  override fun handshake(): Handshake? = handshake

  /** Track a bad route in the route database. Other routes will be attempted first. */
  internal fun connectFailed(