boolean done = doneSignal.await(1, SECONDS);
    if (!done) {
      StringBuilder builder = new StringBuilder();
      for (StackTraceElement trace : thread.getStackTrace()) {
        builder.append("\tat ").append(trace).append('\n');
      }
      fail(builder.toString());
    }
  }

                if (c == ' ') {
                    buf.append("%20");
                } else {
                    final String str = String.valueOf(c);
                    if (StringUtil.isAsciiPrintable(str)) {
                        buf.append(c);
                    } else {
                        buf.append(URLEncoder.encode(str, charset));
                    }
                }
            }

			if len(*lri) == 1 {
				// Remove the write lock.
				delete(l.lockMap, name)
			} else {
				// Remove the appropriate read lock.
				*lri = append((*lri)[:index], (*lri)[index+1:]...)
				l.lockMap[name] = *lri
			}
			delete(l.lockUID, formatUUID(args.UID, entry.idx))
			return true
		}
	}

			switch c {
			case '{', '[':
				nest++
			case '}', ']':
				nest--
			case ',':
				buf = append(buf, ',')
				if nest == 0 {
					buf = append(buf, ' ')
				}
				for i+1 < len(printed) && (printed[i+1] == ' ' || printed[i+1] == '\t') {
					i++
				}
				continue
			}
			buf = append(buf, c)
		}

		f := strings.Fields(string(buf))

			// Do not need to send any internal metadata
			// values to client.
			toRemove = append(toRemove, k)
			continue
		}

		// https://github.com/google/security-research/security/advisories/GHSA-76wf-9vgp-pj7w
		if equals(k, xhttp.AmzMetaUnencryptedContentLength, xhttp.AmzMetaUnencryptedContentMD5) {
			toRemove = append(toRemove, k)
			continue
		}
	}

	for _, k := range toRemove {
		delete(m, k)

            throw new ExtractException(e);
        }
    }

    /**
     * Extracts text from file attachments in PDF annotations.
     * @param doc the PDF document
     * @param writer the writer to append extracted text to
     */
    protected void extractAnnotations(final PDDocument doc, final StringWriter writer) {
        for (final PDPage page : doc.getPages()) {
            try {

            final Iterator<String> values = property.getValue().iterator();
            while (values.hasNext()) {
                value.append(values.next());
                if (values.hasNext()) {
                    value.append(", ");
                }
            }
            this.setRequestProperty(key, value.toString());
        }

        final Iterator propertyValues = values.iterator();
        while (propertyValues.hasNext()) {
            buffer.append(propertyValues.next());
            if (propertyValues.hasNext()) {
                buffer.append(", ");
            }
        }
        connection.setRequestProperty(key, buffer.toString());
    }

    @Override

		labels := make([]string, 0, len(metric.VariableLabels)*2)
		for k, v := range metric.VariableLabels {
			if newLabel, ok := renameLabels[k]; ok {
				labels = append(labels, newLabel, v)
			} else {
				labels = append(labels, k, v)
			}
		}
		labels = append(labels, extraLabels...)
		// If valid non zero value set the metrics
		if metric.Value > 0 {
			m.Set(name, metric.Value, labels...)
		}
	}
}

    StringBuilder input = new StringBuilder();
    StringBuilder expected = new StringBuilder();
    for (int i = 256; i < 1024; i++) {
      input.append((char) i);
      expected.append("[" + i + "]");
    }
    assertThat(SIMPLE_ESCAPER.escape(input.toString())).isEqualTo(expected.toString());
  }

  public void testSurrogatePairs() {
    UnicodeEscaper e = SIMPLE_ESCAPER;