} catch (e: Throwable) {
            FailedPlan(e)
          }
        }

        else -> {
          return null
        } // Nothing further to try.
      }

    // Already connected. Return it immediately.
    if (plan.isReady) return ConnectResult(plan)

    // Already failed? Return it immediately.
    if (plan is FailedPlan) return plan.result

    // Connect TCP asynchronously.