}
    }

    //asserts none of the files changed/added since last snapshot
    void noneRecompiled() {
        recompiledFiles([])
    }

    //asserts file changed/added since last snapshot
    void recompiledFile(File file) {
        recompiledFiles([file])
    }

    //asserts files changed/added since last snapshot
    void recompiledFiles(File... files) {
        recompiledFiles(files as List)

 *
 * @since 8.8
 */
@Incubating
public interface ProblemId {

    /**
     * The name of the problem.
     *
     * @since 8.8
     */
    String getName();

    /**
     * A human-readable label describing the problem ID.
     *
     * @since 8.8
     */
    String getDisplayName();

    /**
     * The parent group.

     * @since 1.0-milestone-3
     */
    DomainObjectSet<? extends EclipseProjectDependency> getProjectDependencies();

    /**
     * Returns the source directories for this project.
     *
     * @return The source directories. Returns an empty set if the project has no source directories.
     * @since 1.0-milestone-3
     */

     * Returns the build cache configuration.
     *
     * @since 3.5
     */
    BuildCacheConfiguration getBuildCache();

    /**
     * Configures build cache.
     *
     * @since 3.5
     */
    void buildCache(Action<? super BuildCacheConfiguration> action);

    /**
     * Configures plugin management.
     *
     * @since 3.5
     */
    @Configuring

     * @param action Action to configure the CopySpec
     * @return The CopySpec
     * @since 8.5
     */
    @Incubating
    CopySpec copySpec(Action<? super CopySpec> action);

    /**
     * Creates a {@link CopySpec} which can later be used to copy files or create an archive.
     *
     * @return a newly created copy spec
     * @since 8.5
     */
    @Incubating
    CopySpec copySpec();

    /**

     * @param detailsAction the variant selection details configuration
     * @since 6.6
     */
    ComponentSelector variant(ComponentSelector selector, Action<? super VariantSelectionDetails> detailsAction);

    /**
     * Transforms the provided selector into a platform selector.
     *
     * @param selector the original selector
     * @since 6.6
     */
    ComponentSelector platform(ComponentSelector selector);

    /**

    /**
     * The Checkstyle configuration to use. Replaces the {@code configFile} property.
     *
     * @since 2.2
     */
    public TextResource getConfig() {
        return config;
    }

    /**
     * The Checkstyle configuration to use. Replaces the {@code configFile} property.
     *
     * @since 2.2
     */
    public void setConfig(TextResource config) {
        this.config = config;
    }

    /**

 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class Ticker {
  /** Constructor for use by subclasses. */
  protected Ticker() {}

  /** Returns the number of nanoseconds elapsed since this ticker's fixed point of reference. */
  public abstract long read();

  /**
   * A ticker that reads the current time using {@link System#nanoTime}.
   *
   * @since 10.0
   */

 * UnsupportedOperationException}.
 *
 * @author Charles Fry
 * @since 10.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class AbstractCache<K, V> implements Cache<K, V> {

  /** Constructor for use by subclasses. */
  protected AbstractCache() {}

  /** @since 11.0 */
  @Override
  public V get(K key, Callable<? extends V> valueLoader) throws ExecutionException {

     *
     * @since 4.5
     */
    CommandLineToolConfiguration getStaticLibArchiver();

    /**
     * Returns the tool for extracting symbols.
     *
     * @since 4.5
     */
    CommandLineToolConfiguration getSymbolExtractor();

    /**
     * Returns the tool for stripping symbols.
     *
     * @since 4.5
     */
    CommandLineToolConfiguration getStripper();