// so would violate a policy, unless it's OLD.
    val addressStates = this.addressStates
    for (state in addressStates.values) {
      state.concurrentCallCapacity = 0
    }
    for (connection in connections) {
      val addressState = addressStates[connection.route.address] ?: continue
      connection.withLock {
        addressState.concurrentCallCapacity += connection.allocationLimit
      }
    }