protected Double doForward(String value) {
      return Double.valueOf(value);
    }

    @Override
    protected String doBackward(Double value) {
      return value.toString();
    }

    @Override
    public String toString() {
      return "Doubles.stringConverter()";
    }

    private Object readResolve() {
      return INSTANCE;
    }

    private static final long serialVersionUID = 1;

    final Table<R, C, V> delegate = HashBasedTable.create();
    public final Object mutex = new Object[0]; // something Serializable

    @Override
    public String toString() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.toString();
    }

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

    for (int i = 0; i < 10; i++) {
      map.put(i, Integer.toString(i));
    }
    map.trimToSize();
    assertThat(map.entries).hasLength(10);
    assertThat(map.keys).hasLength(10);
    assertThat(map.values).hasLength(10);
    assertEquals(10, map.size());
    for (int i = 0; i < 10; i++) {
      assertEquals(Integer.toString(i), map.get(i));
    }
  }

  public void testEntrySetValueAfterRemoved() {

    Future<?> second = serializer.submitAsync(secondCallable, directExecutor());
    assertThat(secondCallable.called).isFalse();
    assertThat(second.toString()).contains(secondCallable.toString());
    firstFuture.set(null);
    assertThat(second.toString()).contains(secondCallable.future.toString());
  }

  private static class BlockingCallable implements Callable<@Nullable Void> {

        if (message == null || message.startsWith("???")) {
            return getKey();
        }
        return message;
    }

    @Override
    public String toString() {
        return "CrawlingInfoParam [crawlingInfo=" + crawlingInfo + ", crawlingInfoId=" + crawlingInfoId + ", createdTime=" + createdTime
                + ", key=" + key + ", value=" + value + ", docMeta=" + docMeta + "]";
    }

                logger.warn("File Config {} does not exist.", getFileConfigId(), e);
            }
        }
        return fileConfig;
    }

    @Override
    public String toString() {
        return "FileAuthentication [fileConfig=" + fileConfig + ", createdBy=" + createdBy + ", createdTime=" + createdTime

        try {
            final RESULT result = entityType.newInstance();
            result.setName(DfTypeUtil.toString(source.get("name")));
            result.setAttributes(source.entrySet().stream().filter(e -> !"name".equals(e.getKey()))

    return if (record.thrown != null) {
      val sw = StringWriter(4096)
      val pw = PrintWriter(sw)
      record.thrown.printStackTrace(pw)
      String.format("%s\t%s%n%s%n", time.format(d), message, sw.toString())
    } else {
      String.format("%s\t%s%n", time.format(d), message)
    }
  }

    }

    @Override
    public String getAsString(final Object value) {
        if (value == null) {
            return null;
        }
        return StringConversionUtil.toString((Date) value, pattern);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return clazz == java.sql.Timestamp.class;
    }

        DependencyManagement thing = new DependencyManagement();
        assertTrue(thing.equals(thing));
    }

    @Test
    void testToStringNullSafe() {
        assertNotNull(new DependencyManagement().toString());
    }

    @Test
    void testDependencies() {
        DependencyManagement dm = new DependencyManagement();
        Dependency d1 = new Dependency();
        d1.setGroupId("myGroupId");