* used; or if the class exposes a public parameter-less constructor then it will be "new"d and
 * returned.
 *
 * <p>All default instances returned by {@link #get} are generics-safe. Clients won't get type
 * errors for using {@code get(Comparator.class)} as a {@code Comparator<Foo>}, for example.
 * Immutable empty instances are returned for collection types; {@code ""} for string; {@code 0} for

   *
   * @since 11.0
   */
  public static <E> ImmutableMultiset<E> copyHighestCountFirst(Multiset<E> multiset) {
    @SuppressWarnings("unchecked") // generics+arrays
    // TODO(cpovirk): Consider storing an Entry<?> instead of Entry<E>.
    Entry<E>[] entries = (Entry<E>[]) multiset.entrySet().toArray((Entry<E>[]) new Entry<?>[0]);

   *
   * @since 11.0
   */
  public static <E> ImmutableMultiset<E> copyHighestCountFirst(Multiset<E> multiset) {
    @SuppressWarnings("unchecked") // generics+arrays
    // TODO(cpovirk): Consider storing an Entry<?> instead of Entry<E>.
    Entry<E>[] entries = (Entry<E>[]) multiset.entrySet().toArray((Entry<E>[]) new Entry<?>[0]);

E então você não precisará mais se preocupar com nomes como `Optional` e `Union`. 😎

#### Tipos genéricos { #generic-types }

Esses tipos que usam parâmetros de tipo entre colchetes são chamados **tipos genéricos** ou **genéricos**. Por exemplo:

//// tab | Python 3.10+

Você pode utilizar os mesmos tipos internos como genéricos (com colchetes e tipos dentro):

* `list`
* `tuple`
* `set`
* `dict`

import org.apache.maven.api.cli.cisupport.CIInfo;

/**
 * Generic CI support. This offers same support as Maven 3 always had. Is also special, as code will reject this
 * detector result IF there are also any other returned via discovered services.
 */
public class GenericCIDetector implements CIDetector {
    public static final String NAME = "Generic";

    private static final String CI = "CI";

    @Override

            // Generic rights should be in bits 28-31 (0xF0000000)
            assertTrue(ACE.GENERIC_ALL >= 0x10000000, "GENERIC_ALL should be in generic rights range");
            assertTrue(ACE.GENERIC_EXECUTE >= 0x10000000, "GENERIC_EXECUTE should be in generic rights range");
            assertTrue(ACE.GENERIC_WRITE >= 0x10000000, "GENERIC_WRITE should be in generic rights range");

     */
    int SYNCHRONIZE = 0x00100000; // 20
    /**
     * Generic all permissions
     */
    int GENERIC_ALL = 0x10000000; // 28
    /**
     * Generic execute permission
     */
    int GENERIC_EXECUTE = 0x20000000; // 29
    /**
     * Generic write permission
     */
    int GENERIC_WRITE = 0x40000000; // 30
    /**
     * Generic read permission
     */
    int GENERIC_READ = 0x80000000; // 31

    /** Synchronize access right */
    int SYNCHRONIZE = 0x00100000; // 20
    /** Generic all access right */
    int GENERIC_ALL = 0x10000000; // 28
    /** Generic execute access right */
    int GENERIC_EXECUTE = 0x20000000; // 29
    /** Generic write access right */
    int GENERIC_WRITE = 0x40000000; // 30
    /** Generic read access right */
    int GENERIC_READ = 0x80000000; // 31

    // flags for move and copy

    int SYNCHRONIZE = 0x00100000; // 20
    /**
     * All generic permissions.
     */
    int GENERIC_ALL = 0x10000000; // 28
    /**
     * Generic execute permission.
     */
    int GENERIC_EXECUTE = 0x20000000; // 29
    /**
     * Generic write permission.
     */
    int GENERIC_WRITE = 0x40000000; // 30
    /**
     * Generic read permission.
     */
    int GENERIC_READ = 0x80000000; // 31

        assertEquals(
                "Some problems were encountered while processing the POMs",
                message,
                "Empty results should fall back to generic message");
    }

    @Test
    void testExceptionMessageWithNullResults() {
        ProjectBuildingException exception = new ProjectBuildingException((List<ProjectBuildingResult>) null);