L1:[Level] and [LevelVar] now implement the [encoding.TextAppender] interface.
...

[ChaCha8] and [PCG] now implement the [encoding.BinaryAppender] interface....

import org.gradle.api.provider.Property


/**
 *  An extension for project build script to configure whether the leftover files should be treated:
 *  report only, or a failure.
 */
interface TestFileCleanUpExtension {
    val reportOnly: Property<Boolean>

 */

package gradlebuild.incubation.action

import org.gradle.api.file.ConfigurableFileCollection
import org.gradle.api.file.RegularFileProperty
import org.gradle.workers.WorkParameters


interface IncubatingApiReportAggregationParameter : WorkParameters {
    val reports: ConfigurableFileCollection
    val htmlReportFile: RegularFileProperty

The value returned by [New] now also implements the [encoding.BinaryAppender] interface....

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue
  static <T extends Throwable> T assertThrows(

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue
  static <T extends Throwable> T assertThrows(

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue
  static <T extends Throwable> T assertThrows(

            HierarchyFixture.class),
        SubscriberRegistry.flattenHierarchy(HierarchyFixture.class));
  }

  private interface HierarchyFixtureInterface {
    // Exists only for hierarchy mapping; no members.
  }

  private interface HierarchyFixtureSubinterface extends HierarchyFixtureInterface {
    // Exists only for hierarchy mapping; no members.
  }

import org.apache.maven.api.annotations.NotThreadSafe;
import org.apache.maven.api.annotations.Nullable;

/**
 * An XML reader request.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface XmlReaderRequest {

    @Nullable
    Path getPath();

    @Nullable
    Path getRootDirectory();

    @Nullable
    URL getURL();

    @Nullable
    InputStream getInputStream();