checkArgument(
            fromUpperBounds.length == toUpperBounds.length
                && fromLowerBounds.length == toLowerBounds.length,
            "Incompatible type: %s vs. %s",
            fromWildcardType,
            to);
        for (int i = 0; i < fromUpperBounds.length; i++) {
          populateTypeMappings(mappings, fromUpperBounds[i], toUpperBounds[i]);
        }

  public Spliterator<E> spliterator() {
    return Spliterators.spliterator(this, SPLITERATOR_CHARACTERISTICS);
  }

  private static final Object[] EMPTY_ARRAY = {};

  @Override
  @J2ktIncompatible // Incompatible return type change. Use inherited (unoptimized) implementation
  public final Object[] toArray() {
    return toArray(EMPTY_ARRAY);
  }

  @CanIgnoreReturnValue
  @Override
  /*

- google.golang.org/protobuf: v1.24.0
- gotest.tools/v3: v3.0.2
- k8s.io/klog/v2: v2.2.0

### Changed
- cloud.google.com/go: v0.38.0 → v0.51.0
- github.com/Azure/azure-sdk-for-go: [v35.0.0+incompatible → v43.0.0+incompatible](https://github.com/Azure/azure-sdk-for-go/compare/v35.0.0...v43.0.0)
- github.com/Azure/go-autorest/autorest/adal: [v0.5.0 → v0.8.2](https://github.com/Azure/go-autorest/autorest/adal/compare/v0.5.0...v0.8.2)

        <field>
          <name>v4Api</name>
          <version>1.1.0</version>
          <type>boolean</type>
          <description>Marks this Mojo as using Maven 4 API. This makes the plugin implicitly incompatible with earlier Maven versions. Only evaluated since Maven 4.</description>
          <defaultValue>false</defaultValue>
        </field>
        <field>
          <name>instantiationStrategy</name>

- github.com/aws/aws-sdk-go: [v1.28.2 → v1.35.24](https://github.com/aws/aws-sdk-go/compare/v1.28.2...v1.35.24)
- github.com/blang/semver: [v3.5.0+incompatible → v3.5.1+incompatible](https://github.com/blang/semver/compare/v3.5.0...v3.5.1)
- github.com/checkpoint-restore/go-criu/v4: [v4.0.2 → v4.1.0](https://github.com/checkpoint-restore/go-criu/v4/compare/v4.0.2...v4.1.0)

    NullPointerTester tester = new NullPointerTester();
    tester.setDefault(int.class, 1);
    tester.testAllPublicStaticMethods(IntMath.class);
  }

  @GwtIncompatible // isPrime is GWT-incompatible
  public void testIsPrime() {
    // Defer correctness tests to Long.isPrime

    // Check the first 100,000 integers
    for (int i = 0; i < 100000; i++) {

 *       is strongly recommended.
 *   <li>Streams are standard Java, not requiring a third-party dependency (but do render your code
 *       incompatible with Java 7 and earlier).
 * </ul>
 *
 * <h3>Example</h3>
 *
 * <p>Here is an example that accepts a list from a database call, filters it based on a predicate,

_Nothing has changed._

### Changed
- github.com/coredns/corefile-migration: [v1.0.21 → v1.0.24](https://github.com/coredns/corefile-migration/compare/v1.0.21...v1.0.24)
- github.com/coreos/etcd: [v3.3.13+incompatible → v3.3.10+incompatible](https://github.com/coreos/etcd/compare/v3.3.13...v3.3.10)
- github.com/magiconair/properties: [v1.8.1 → v1.8.0](https://github.com/magiconair/properties/compare/v1.8.1...v1.8.0)

## Version 3.9.0

_2017-09-03_

 *  **Interceptors are more capable.** The `Chain` interface now offers access
    to the call and can adjust all call timeouts. Note that this change is
    source-incompatible for code that implements the `Chain` interface.
    We don't expect this to be a problem in practice!

 *  **OkHttp has an experimental new API for tracking metrics.** The new

///

Now, imagine that with **many** other **packages** that all your **projects depend on**. That's very difficult to manage. And you would probably end up running some projects with some **incompatible versions** of the packages, and not knowing why something isn't working.