Collection<E> siblingCollection = new ArrayList<>();
    siblingCollection.add(sampleElement);

    Collection<E> copy = new ArrayList<>();
    // Avoid copy.addAll(collection), which runs afoul of an Android bug in older versions:
    // http://b.android.com/72073 http://r.android.com/98929
    Iterators.addAll(copy, collection.iterator());

    try {
      collection.add(sampleElement);

    @ParametricNullness
    public T get() {
      // Another variant of Double Checked Locking.
      //
      // We use two volatile reads. We could reduce this to one by
      // putting our fields into a holder class, but (at least on x86)
      // the extra memory consumption and indirection are more
      // expensive than the extra volatile reads.
      long nanos = expirationNanos;
      long now = System.nanoTime();

listen to her, still it was good practice to say it over) `--yes,
that's about the right distance--but then I wonder what Latitude
or Longitude I've got to?'  (Alice had no idea what Latitude was,
or Longitude either, but thought they were nice grand words to
say.)

  Presently she began again.  `I wonder if I shall fall right
THROUGH the earth!  How funny it'll seem to come out among the

 *   // do other things since the monitor was not available
 * }
 * }</pre>
 *
 * <h2>Comparison with {@code synchronized} and {@code ReentrantLock}</h2>
 *
 * <p>The following examples show a simple threadsafe holder expressed using {@code synchronized},
 * {@link ReentrantLock}, and {@code Monitor}.
 *
 * <h3>{@code synchronized}</h3>
 *
 * <p>This version is the fewest lines of code, largely because the synchronization mechanism used

   * skipping over occurrences of {@link Optional#absent}. Iterators are unmodifiable and are
   * evaluated lazily.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method has no equivalent in Java 8's
   * {@code Optional} class; use {@code
   * optionals.stream().filter(Optional::isPresent).map(Optional::get)} instead.
   *

  }

  public void testAccept() {
    File dir = new File("foo");
    FilenameFilter filter = new PatternFilenameFilter("a+");
    assertTrue(filter.accept(dir, "a"));
    assertTrue(filter.accept(dir, "aaaa"));
    assertFalse(filter.accept(dir, "b"));

    // Show that dir is ignored
    assertTrue(filter.accept(null, "a"));
  }

  public void testNulls() throws Exception {

 * the License.
 */

package com.google.common.base;

import com.google.common.annotations.GwtCompatible;

/**
 * Holder for extra methods of {@code Objects} only in web. Intended to be empty for regular
 * version.
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault

  }

  private static final Predicate<Entry<Integer, String>> FILTER_GET_PREDICATE =
      new Predicate<Entry<Integer, String>>() {
        @Override
        public boolean apply(Entry<Integer, String> entry) {
          return !"badvalue".equals(entry.getValue()) && 55556 != entry.getKey();
        }
      };

  private static final Predicate<Entry<String, Integer>> FILTER_KEYSET_PREDICATE =
      new Predicate<Entry<String, Integer>>() {

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;

import java.lang.annotation.Target;

/**
 * Disables Animal Sniffer's checking of compatibility with older versions of Java/Android.
 *
 * <p>Each package's copy of this annotation needs to be listed in our {@code pom.xml}.
 */
@Target({METHOD, CONSTRUCTOR, TYPE})
@ElementTypesAreNonnullByDefault

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;

import java.lang.annotation.Target;

/**
 * Disables Animal Sniffer's checking of compatibility with older versions of Java/Android.
 *
 * <p>Each package's copy of this annotation needs to be listed in our {@code pom.xml}.
 */
@Target({METHOD, CONSTRUCTOR, TYPE})