@Test
    void testHashCode() {
        ArtifactVersion v1 = newArtifactVersion("1");
        ArtifactVersion v2 = newArtifactVersion("1.0");
        assertTrue(v1.equals(v2));
        assertEquals(v1.hashCode(), v2.hashCode());
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(newArtifactVersion("1").equals(null));
    }

    @Test
    void testEqualsTypeSafe() {

        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 31 * hash + (recommendedVersion == null ? 0 : recommendedVersion.hashCode());
        hash = 31 * hash + (restrictions == null ? 0 : restrictions.hashCode());
        return hash;
    }

    public long getTreeNum() {
        return this.treeNum;
    }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        return this.share.hashCode() + 7 * this.service.hashCode();
    }

    @Override

   * Character#hashCode(char)}.
   *
   * @param value a primitive {@code char} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Character.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a char is the int version of the char itself, so it's simplest to return"
          + " that.")
  public static int hashCode(char value) {
    return value;
  }

   *
   * @param value a primitive {@code short} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Short.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a short is the int version of the short itself, so it's simplest to return"
          + " that.")
  public static int hashCode(short value) {
    return value;
  }

   *
   * @param value a primitive {@code short} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Short.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a short is the int version of the short itself, so it's simplest to return"
          + " that.")
  public static int hashCode(short value) {
    return value;
  }

    assertTrue(map.entrySet().contains(immutableEntry("a", new IntHolder(3))));
    Map<String, Integer> intMap = ImmutableMap.of("a", 3, "b", 2);
    assertEquals(intMap.hashCode(), map.entrySet().hashCode());
    assertEquals(intMap.hashCode(), map.hashCode());
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testViewSerialization() {

          <version>1.2.0+</version>
          <comment>Generated hashCode() and equals() based on identifier also calls its super, which breaks comparison
          </comment>
          <code>
            <![CDATA[
    /**
     * Computes a hash value based on {@link #getType()} and {@link #getProvides()} values.
     */
    public int hashCode() {
        return java.util.Objects.hash(getType(), getProvides());

  }

  @Override
  Set<Entry<K, V>> createEntries() {
    return new EntrySet();
  }

  private final class EntrySet extends Entries implements Set<Entry<K, V>> {
    @Override
    public int hashCode() {
      return Sets.hashCodeImpl(this);
    }

    @Override
    public boolean equals(@Nullable Object o) {
      return Sets.equalsImpl(this, o);
    }
  }

  }

  @Override
  public boolean equals(@Nullable Object o) {
    assertTrue(Thread.holdsLock(mutex));
    return super.equals(o);
  }

  @Override
  public int hashCode() {
    assertTrue(Thread.holdsLock(mutex));
    return super.hashCode();
  }

  @Override
  public boolean add(@Nullable E o) {
    assertTrue(Thread.holdsLock(mutex));
    return super.add(o);
  }

  @Override