val acquired =
        connection.withLock {
          when {
            requireMultiplexed && !connection.isMultiplexed -> {
              false
            }

            !connection.isEligible(address, routes) -> {
              false
            }

            else -> {
              call.acquireConnectionNoEvents(connection)
              true
            }
          }
        }

        }

        return null
      }

      HTTP_MISDIRECTED_REQUEST -> {
        // OkHttp can coalesce HTTP/2 connections even if the domain names are different. See
        // RealConnection.isEligible(). If we attempted this and the server returned HTTP 421, then
        // we can retry on a different connection.
        val requestBody = userResponse.request.body
        if (requestBody != null && requestBody.isOneShot()) {