validateStringNotEmpty("modelVersion", problems, Severity.ERROR, Version.BASE, m.getModelVersion(), m);

        validateId("groupId", problems, m.getGroupId(), m);

        validateId("artifactId", problems, m.getArtifactId(), m);

        validateStringNotEmpty("packaging", problems, Severity.ERROR, Version.BASE, m.getPackaging(), m);

        // inheritance assembly
        assembleInheritance(lineage, request, problems);

        Model resultModel = resultData.getModel();

        problems.setSource(resultModel);
        problems.setRootModel(resultModel);

        // model interpolation
        resultModel = interpolateModel(resultModel, request, problems);
        resultData.setModel(resultModel);

            problemCollector.problems().map(BuildSession::convert).forEach(problems::add);
            if (problemCollector.problemsOverflow()) {
                problems.add(
                        0,
                        new DefaultModelProblem(
                                "Too many model problems reported (listed problems are just a subset of reported problems)",

            slf4jLogger.warn("");
            slf4jLogger.warn("Some problems were encountered while building the effective toolchains");

            for (Problem problem : toolchainsResult.getProblems()) {
                slf4jLogger.warn("{} @ {}", problem.getMessage(), problem.getLocation());
            }

            slf4jLogger.warn("");
        }
    }

  * Allow VPC CIDR to be specified (experimental)
  * Fix problems with >2 security groups
* GCP:
  * Enable using gcr.io as a Docker registry mirror.
  * Make bigger master root disks in GCE for large clusters.
  * Change default clusterCIDRs from /16 to /14 allowing 1000 Node clusters by default.
  * Allow Debian Jessie on GCE.
  * Node problem detector addon pod detects and reports kernel deadlocks.
* OpenStack

    /**
     * Cuts this string up into alternating parameter names and values. This divides a query string
     * like `subject=math&easy&problem=5-2=3` into the list `["subject", "math", "easy", null,
     * "problem", "5-2=3"]`. Note that values may be null and may contain '=' characters.
     */
    private fun String.toQueryNamesAndValues(): MutableList<String?> {

      apply {
        this.eventListenerFactory = eventListenerFactory
      }

    /**
     * Configure this client to retry or not when a connectivity problem is encountered. By default,
     * this client silently recovers from the following problems:
     *
     * * **Unreachable IP addresses.** If the URL's host has multiple IP addresses,

    They may also be fired in cases where no event was published previously. In this release we did
    an internal rewrite of our event code to fix problems where events were lost or unbalanced.

 *  Fix: Don't leak a connection when a call is canceled immediately preceding the `onFailure()`
    callback.

      Class<X> exceptionType, ClosingFunction<? super X, ? extends V> fallback, Executor executor) {
    return catchingMoreGeneric(exceptionType, fallback, executor);
  }

  // Avoids generic type capture inconsistency problems where |? extends V| is incompatible with V.
  private <X extends Throwable, W extends V> ClosingFuture<V> catchingMoreGeneric(
      Class<X> exceptionType, ClosingFunction<? super X, W> fallback, Executor executor) {

    assertThat(server.takeRequest().exchangeIndex).isEqualTo(1) // New connection.
  }

  /**
   * We had a bug where we'd perform infinite retries of route that fail with connection shutdown
   * errors. The problem was that the logic that decided whether to reuse a route didn't track
   * certain HTTP/2 errors. https://github.com/square/okhttp/issues/5547
   */
  @Test
  fun noRecoveryFromTwoRefusedStreams() {
    server.enqueue(