}

  public static <E extends @Nullable Object> SpliteratorTester<E> of(
      Supplier<Spliterator<E>> spliteratorSupplier) {
    return new SpliteratorTester<>(
        ImmutableSet.of(() -> new GeneralSpliteratorOfObject<>(spliteratorSupplier.get())));
  }

  /**
   * @since 28.1
   */
  public static SpliteratorTester<Integer> ofInt(Supplier<Spliterator.OfInt> spliteratorSupplier) {
    return new SpliteratorTester<>(

 * model builder.
 *
 */
public interface ModelCache {

    <T> T computeIfAbsent(String groupId, String artifactId, String version, String tag, Supplier<T> data);

    <T> T computeIfAbsent(Source path, String tag, Supplier<T> data);

            }
        }
        return locale;
    }

    private static Supplier<Locale> defaultLocaleSupplier;

    public static Locale getDefault() {
        if (defaultLocaleSupplier != null) {
            return defaultLocaleSupplier.get();
        }
        return Locale.ENGLISH;
    }

    public static void setDefault(final Supplier<Locale> localeSupplier) {
        defaultLocaleSupplier = localeSupplier;
    }

import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Supplier;
import java.util.stream.Collectors;

import com.google.inject.AbstractModule;
import com.google.inject.binder.AnnotatedBindingBuilder;
import com.google.inject.name.Names;

     * The stack trace for this exception will be output when this error level is enabled.
     *
     * @param error
     */
    void debug(Throwable error);

    void debug(Supplier<String> content);

    void debug(Supplier<String> content, Throwable error);

    /**
     * @return true if the <b>info</b> error level is enabled
     */
    boolean isInfoEnabled();

    /**

 * memorized and kept as long as supplier instance is kept open.
 * <p>
 * This class is not thread safe and must be used from one thread only, while the constructed {@link RepositorySystem}
 * is thread safe.
 * <p>
 * Important: Given the instance of supplier memorizes the supplier {@link RepositorySystem} instance it supplies,

          A result(Collector<T, A, R> collector, Iterable<T> inputs) {
        A accum = collector.supplier().get();
        for (T input : inputs) {
          A newAccum = collector.supplier().get();
          collector.accumulator().accept(newAccum, input);
          accum = collector.combiner().apply(accum, newAccum);
        }
        return accum;
      }

  public void testOr_supplier_present() {
    assertEquals("a", Optional.of("a").or(Suppliers.ofInstance("fallback")));
  }

  public void testOr_supplier_absent() {
    assertEquals("fallback", Optional.absent().or(Suppliers.ofInstance("fallback")));
  }

  public void testOr_nullSupplier_absent() {
    Supplier<Object> nullSupplier = (Supplier<Object>) Suppliers.<@Nullable Object>ofInstance(null);

    }

    public static class StreamOf<T> {

        private final Supplier<Stream<T>> supplier;

        public StreamOf(final Supplier<Stream<T>> supplier) {
            this.supplier = supplier;
        }

        public void of(final Consumer<Stream<T>> stream) {
            try (Stream<T> s = supplier.get()) {
                stream.accept(s);
            }
        }

  private final Supplier<Boolean> validator;
  private final Set<E> delegate;
  private final Supplier<String> errorMessage;

  public static final <E> InvalidatableSet<E> of(
      Set<E> delegate, Supplier<Boolean> validator, Supplier<String> errorMessage) {
    return new InvalidatableSet<>(
        checkNotNull(delegate), checkNotNull(validator), checkNotNull(errorMessage));
  }

  @Override
  protected Set<E> delegate() {