// A simple type whose .toString() will return the same value each time, but without maintaining
  // a strong reference to that value.
  static class Key {
    private final int value;
    private WeakReference<String> toString;

    Key(int value) {
      this.value = value;
    }

    @Override
    public synchronized String toString() {
      String s;
      if (toString != null) {

        logger.debug(toString(content));
    }

    private String toString(CharSequence content) {
        if (content == null) {
            return "";
        } else {
            return content.toString();
        }
    }

    @Override
    public void debug(CharSequence content, Throwable error) {
        logger.debug(toString(content), error);
    }

    @Override

            result.setAccessType(DfTypeUtil.toString(source.get("accessType")));
            result.setClientIp(DfTypeUtil.toString(source.get("clientIp")));
            result.setHitCount(DfTypeUtil.toLong(source.get("hitCount")));
            result.setHitCountRelation(DfTypeUtil.toString(source.get("hitCountRelation")));
            result.setLanguages(DfTypeUtil.toString(source.get("languages")));

  public void testToString_minimal() {
    assertNotNull("toString() should not return null", collection.toString());
  }

  @CollectionSize.Require(ZERO)
  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
  public void testToString_size0() {
    assertEquals("emptyCollection.toString should return []", "[]", collection.toString());
  }

  @CollectionSize.Require(ONE)

  public void testToString_minimal() {
    assertNotNull("toString() should not return null", collection.toString());
  }

  @CollectionSize.Require(ZERO)
  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
  public void testToString_size0() {
    assertEquals("emptyCollection.toString should return []", "[]", collection.toString());
  }

  @CollectionSize.Require(ONE)

            queryBuf.append(lowerTerm != null ? "*".equals(Term.toString(lowerTerm)) ? "\\*" : Term.toString(lowerTerm) : "*");
            queryBuf.append(" TO ");
            final BytesRef upperTerm = termRangeQuery.getUpperTerm();
            queryBuf.append(upperTerm != null ? "*".equals(Term.toString(upperTerm)) ? "\\*" : Term.toString(upperTerm) : "*");
            queryBuf.append(termRangeQuery.includesUpper() ? ']' : '}');

    // Two futures should not have the same toString, to avoid people asserting on it
    assertThat(SettableFuture.create().toString()).isNotEqualTo(SettableFuture.create().toString());
  }

  public void testToString_oom() throws Exception {
    SettableFuture<Object> future = SettableFuture.create();
    future.set(
        new Object() {
          @Override
          public String toString() {
            throw new OutOfMemoryError();

        setupEpg(_epgMap, et -> ((WebAuthentication) et).getParameters(),
                (et, vl) -> ((WebAuthentication) et).setParameters(DfTypeUtil.toString(vl)), "parameters");
        setupEpg(_epgMap, et -> ((WebAuthentication) et).getPassword(),
                (et, vl) -> ((WebAuthentication) et).setPassword(DfTypeUtil.toString(vl)), "password");

        assertEquals(8, decodedBytes);

        // Verify the round trip preserves the value
        // Note: We can't directly access endOfFile field, but toString contains it
        assertEquals(original.toString(), decoded.toString());
    }

    /**
     * Test FileEndOfFileInformation with various end of file values
     */
    @ParameterizedTest

  @SuppressWarnings("deprecation") // We still need to test our deprecated APIs.
  public void testToString() {
    assertThat(md5().toString()).isEqualTo("Hashing.md5()");
    assertThat(sha1().toString()).isEqualTo("Hashing.sha1()");
    assertThat(sha256().toString()).isEqualTo("Hashing.sha256()");
    assertThat(sha512().toString()).isEqualTo("Hashing.sha512()");
  }

  private static void assertMessageDigestHashing(byte[] input, String algorithmName)