final StringBuilder tempBuf = new StringBuilder();
                appendJson(e.getKey().toString(), e.getValue(), tempBuf);
                return tempBuf.toString();
            }).collect(Collectors.joining(","));
            buf.append(json);
            buf.append('}');
        } else if (value instanceof Long || value instanceof Integer) {

        assertEquals(0, stackTrace.length); // Stack trace should be empty when not writable
    }

    /**
     * Test toString method
     */
    public void test_toString() {
        CrawlerSystemException exception1 = new CrawlerSystemException("Test message");
        String toString1 = exception1.toString();
        assertNotNull(toString1);
        assertTrue(toString1.contains("CrawlerSystemException"));

              @Override
              public boolean equals(@Nullable Object o) {
                return map.equals(o);
              }

              @Override
              public String toString() {
                return map.toString();
              }

              @Override
              public @Nullable String remove(Object key) {
                return map.remove(key);
              }

            buf.append("Disallow: /websvn/").append('\n');
            final File robotTxtFile = new File(tempDir, "robots.txt");
            FileUtil.writeBytes(robotTxtFile.getAbsolutePath(), buf.toString().getBytes("UTF-8"));
            robotTxtFile.deleteOnExit();

            // sitemaps.xml
            buf = new StringBuilder();
            buf.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>").append('\n');

        this.compareScope = compareScope;
    }

    // ---------------------------------------------------------------------
    @Override
    public String toString() {
        return "[" + (md == null ? "no metadata" : md.toString()) + "]";
    }

    // ---------------------------------------------------------------------
    private static int compareStrings(String s1, String s2) {

    assertEquals("{bar={1=b}, foo={1=a, 3=c}}", table.toString());
    assertEquals("{bar={1=b}, foo={1=a, 3=c}}", table.rowMap().toString());
  }

  public void testCellSetToString_ordered() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertEquals("[(bar,1)=b, (foo,1)=a, (foo,3)=c]", table.cellSet().toString());
  }

  public void testRowKeySetToString_ordered() {

    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + ":" + doBuildColumnString(", ") + "@" + Integer.toHexString(hashCode());
    }

    protected abstract String doBuildColumnString(String dm);

    @Override
    public String toStringWithRelation() { // #pending
        return toString();
    }

    @Override

        setupEpg(_epgMap, et -> ((CrawlingInfoParam) et).getCreatedTime(),
                (et, vl) -> ((CrawlingInfoParam) et).setCreatedTime(DfTypeUtil.toLong(vl)), "createdTime");
        setupEpg(_epgMap, et -> ((CrawlingInfoParam) et).getKey(), (et, vl) -> ((CrawlingInfoParam) et).setKey(DfTypeUtil.toString(vl)),
                "key");

    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + ":" + doBuildColumnString(", ") + "@" + Integer.toHexString(hashCode());
    }

    protected abstract String doBuildColumnString(String dm);

    @Override
    public String toStringWithRelation() { // #pending
        return toString();
    }

    @Override

    result = 31 * result + peerCertificates.hashCode()
    result = 31 * result + localCertificates.hashCode()
    return result
  }

  override fun toString(): String {
    val peerCertificatesString = peerCertificates.map { it.name }.toString()
    return "Handshake{" +
      "tlsVersion=$tlsVersion " +
      "cipherSuite=$cipherSuite " +
      "peerCertificates=$peerCertificatesString " +