}
                sb.append("\n[")
                        .append(i)
                        .append("]: index [")
                        .append(response.getIndex())
                        .append("], id [")
                        .append(response.getId())
                        .append("], message [")
                        .append(response.getFailureMessage())

    }

    public void test_longMessage() {
        // Test with a very long message
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 1000; i++) {
            sb.append("Long message part ").append(i).append(" ");
        }
        String longMessage = sb.toString();

        PluginException exception = new PluginException(longMessage);

        assertNotNull(exception);

    // Double.toString(Math.PI).length() == 17
    StringBuilder b = new StringBuilder((17 + 2) * (iMax + 1));
    b.append('[');
    for (int i = 0; ; i++) {
      b.append(longBitsToDouble(longs.get(i)));
      if (i == iMax) {
        return b.append(']').toString();
      }
      b.append(',').append(' ');
    }
  }

  /**
   * Saves the state to a stream (that is, serializes it).
   *

        @Test
        @DisplayName("Should append referral data")
        void testAppend() {
            DfsReferralDataInternal toAppend = mock(DfsReferralDataInternal.class);

            // Test with mock
            doNothing().when(mockReferralData).append(toAppend);
            mockReferralData.append(toAppend);
            verify(mockReferralData, times(1)).append(toAppend);

			for k := range mg.ExtraLabels {
				commonLabels = append(commonLabels, k)
			}
			for _, d := range mg.Descriptors {
				labels := slices.Clone(d.VariableLabels)
				labels = append(labels, commonLabels...)
				metric := metricDisplay{
					Name:   mg.MetricFQN(d.Name),
					Help:   d.Help,
					Type:   d.Type.String(),
					Labels: labels,
				}
				metrics = append(metrics, metric)
			}
		}
	}

        StringBuilder sb = new StringBuilder("LeaseKey[");
        for (int i = 0; i < key.length; i++) {
            if (i > 0) {
                sb.append(' ');
            }
            sb.append(String.format("%02X", key[i] & 0xFF));
        }
        sb.append(']');
        return sb.toString();
    }

        if (!list.isEmpty()) {
            final StringBuilder buf = new StringBuilder();
            for (final String value : list) {
                if (buf.length() > 0) {
                    buf.append(',');
                }
                buf.append(value);
            }
            System.setProperty(SPRING_PROFILES_ACTIVE, buf.toString());
        }
    }

                    if (!line.trim().startsWith("#")) {
                        existingClasses.add(line.trim());
                    }
                    contentBuilder.append(line).append("\n");
                }
                existingContent = contentBuilder.toString();
            }
        } catch (IOException e) {

        try {
            searchLogHelper.storeSearchLog();
        } catch (final Exception e) {
            logger.error("Failed to store a search log.", e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        return resultBuf.toString();
    }

    }

    @Override
    public String toString() {
      StringBuilder builder = new StringBuilder(size() * 3);
      builder.append('[').append(array[start]);
      for (int i = start + 1; i < end; i++) {
        builder.append(", ").append(array[i]);
      }
      return builder.append(']').toString();
    }

    char[] toCharArray() {
      return Arrays.copyOfRange(array, start, end);
    }