if err != nil {
				return nil, false, err
			}

			if flatten {
				// Flatten if array.
				if arr, ok := rval.([]interface{}); ok {
					result = append(result, arr...)
					continue
				}
			}
			result = append(result, rval)
		}
		return result, true, nil
	}
	panic("cannot reach here")

	conditions := make([]metav1.Condition, 0)
	if programmed {
		conditions = append(conditions, metav1.Condition{
			Type:   string(gateway.GatewayConditionProgrammed),
			Status: kstatus.StatusTrue,
		})
	} else {
		conditions = append(conditions, metav1.Condition{
			Type:   string(gateway.GatewayConditionProgrammed),
			Status: kstatus.StatusFalse,
		})
	}

						Valid:        true,
						SerialNumber: "serial_number",
						NotAfter:     "expires",
						NotBefore:    "valid",
						Type:         "type",
					},
				},
			},
			expected: append(
				[]string{"olinger", "serial_number", "expires", "valid", "type"},
				secretItemColumns...),
			unexpected: []string{"source", "destination", "certdata"},
		},
		{

    }

    @Override
    public String toString() {
      StringBuilder builder = new StringBuilder(size() * 5);
      builder.append('[').append(array[start]);
      for (int i = start + 1; i < end; i++) {
        builder.append(", ").append(array[i]);
      }
      return builder.append(']').toString();
    }

    int[] toIntArray() {
      return Arrays.copyOfRange(array, start, end);
    }

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

  public void testSurrogatePairs() {
    UnicodeEscaper e = SIMPLE_ESCAPER;

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

  public void testSurrogatePairs() {
    UnicodeEscaper e = SIMPLE_ESCAPER;

	if list == nil {
		return []Target{}
	}

	list.RLock()
	defer list.RUnlock()

	targets := make([]Target, 0, len(list.targets))
	for _, tgt := range list.targets {
		targets = append(targets, tgt)
	}

	return targets
}

// Empty returns true if targetList is empty.
func (list *TargetList) Empty() bool {
	list.RLock()
	defer list.RUnlock()

	return len(list.targets) == 0

        }
        final StringBuilder buf = new StringBuilder();
        for (int i = 0; i < values.length - 1; i++) {
            if (buf.length() > 0) {
                buf.append('/');
            }
            buf.append(values[i]);
        }
        return new PathInfo(buf.toString(), values[values.length - 1]);
    }

    protected static String createParentId(final String prefix) {

		if err := s.hostsideProbeIPSet.AddIP(pip, ipProto, podUID, false); err != nil {
			ipsetAddrErrs = append(ipsetAddrErrs, err)
			log.Errorf("failed adding pod %s to ipset %s with ip %s, error was %s",
				pod.Name, &s.hostsideProbeIPSet.Prefix, pip, err)
		} else {
			addedIps = append(addedIps, pip)
		}
	}

	return addedIps, errors.Join(ipsetAddrErrs...)
}

	msgs := diag.Messages{}

	m, err := checkServerVersion(cli)
	if err != nil {
		return nil, err
	}
	msgs = append(msgs, m...)

	msgs = append(msgs, checkInstallPermissions(cli, ctx.IstioNamespace())...)
	gwMsg, err := checkGatewayAPIs(cli)
	if err != nil {
		return nil, err
	}
	msgs = append(msgs, gwMsg...)

	// TODO: add more checks

	sa := local.NewSourceAnalyzer(