// preceded and followed by a faulting page.
func dangerousSlice(t *testing.T) []byte {
	pagesize := syscall.Getpagesize()
	b, err := syscall.Mmap(0, 0, 3*pagesize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANONYMOUS|syscall.MAP_PRIVATE)
	if err != nil {
		t.Fatalf("mmap failed %s", err)
	}
	err = syscall.Mprotect(b[:pagesize], syscall.PROT_NONE)
	if err != nil {
		t.Fatalf("mprotect low failed %s\n", err)
	}

Pengyuan Bian <******@****.***> 1625172474 -0700

Shinsuke Sugaya <******@****.***> 1553287182 +0900

        map.putAll(m);
        assertThat(map.get("THREE"), is("3"));
        assertThat(map.get("FOUR"), is("4"));
        assertThat(map.size(), is(4));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPerformance() throws Exception {
        for (int j = 0; j < 3; ++j) {
            final int num = 100000;
            final Map<String, String> hmap = new HashMap<String, String>();

        map.put("ツ", new String[] { "tu", "tsu" });
        map.put("テ", new String[] { "te" });
        map.put("ト", new String[] { "to" });

        map.put("ナ", new String[] { "na" });
        map.put("ニ", new String[] { "ni" });
        map.put("ヌ", new String[] { "nu" });
        map.put("ネ", new String[] { "ne" });
        map.put("ノ", new String[] { "no" });

    /**
     * インスタンスを構築します。
     *
     * @param map
     *            キーと値を追加する対象の<code>Map</code>
     */
    protected Maps(final Map<K, V> map) {
        this.map = map;
    }

    /**
     * {@link Map}にキーと値を追加します。
     *
     * @param key
     *            <code>Map</code>に追加されるキー
     * @param value
     *            <code>Map</code>に追加される値
     * @return このインスタンス自身
     */

  }

  @Test fun regularMappings() {
    assertThat("hello".map()).isEqualTo("hello")
    assertThat("hello-world".map()).isEqualTo("hello-world")
    assertThat("HELLO".map()).isEqualTo("hello")
    assertThat("Hello".map()).isEqualTo("hello")

    // These compound characters map their its components.
    assertThat("¼".map()).isEqualTo("1⁄4")
    assertThat("™".map()).isEqualTo("tm")
  }

            });
    }

    private static <T> Map<AccessorKey, T> diff(Map<AccessorKey, T> first, Map<AccessorKey, T> second) {
        return first.entrySet().stream()
            .filter(e -> !second.containsKey(e.getKey()))
            .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
    }

import java.lang.annotation.RetentionPolicy;
import java.util.Map;
import java.util.Set;

/**
 * Optional features of classes derived from {@code Map}.
 *
 * @author George van den Driessche
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
@GwtCompatible
public enum MapFeature implements Feature<Map> {
  /**

    Map<Integer, String> map = CompactLinkedHashMap.create();
    map.put(1, "a");
    map.put(4, "b");
    map.put(3, "d");
    map.put(2, "c");
    map.remove(4);
    testHasMapEntriesInOrder(map, 1, "a", 3, "d", 2, "c");
  }

  public void testInsertionOrderAfterRemoveLastEntry() {
    Map<Integer, String> map = CompactLinkedHashMap.create();
    map.put(1, "a");
    map.put(4, "b");