}

    @Test
    public void test_deleteByInvalidQueryString() throws Exception {
        try {
            suggester.indexer().deleteByQuery("invalid:[query");
            // Some invalid queries may still be accepted by OpenSearch
        } catch (Exception e) {
            // Expected - invalid query syntax
            assertTrue(e instanceof SuggestIndexException || e.getCause() != null);
        }
    }

            }
        }
        return childUrlSet.isEmpty() ? null : childUrlSet;
    }

    /**
     * Retrieves child URLs for a given document ID from the search engine index.
     * This method queries the search engine for child documents and extracts their URLs.
     *
     * @param searchEngineClient the search engine client to query
     * @param id the parent document ID to find children for

            /* Catch any shard failures. These only cause a non-200 response if
             * no shard succeeds. But we need to fail the tests on all of these
             * because they mean invalid syntax or broken queries or something
             * else that we don't want to teach people to do. The REST test
             * framework doesn't allow us to have assertions in the setup

     *
     * This method replaces all occurrences of '*' with '\*' and
     * all occurrences of '?' with '\?' to ensure that these characters
     * are treated as literals rather than wildcard characters in queries.
     *
     * @param query the query string to escape
     * @return the escaped query string
     */
    public static String escapeWildcardQuery(final String query) {

    // Attribute
    // =========

    /** Client for interacting with the search engine. */
    @Resource
    protected SearchEngineClient searchEngineClient;

    /** Helper for building and parsing search queries. */
    @Resource
    protected QueryHelper queryHelper;

    /** Helper for executing search operations. */
    @Resource
    protected SearchHelper searchHelper;

                timeoutTask.cancel();
            }
        }

        return resultBuf.toString();

    }

    /**
     * Gets the count of currently running crawler jobs.
     * This method queries the scheduled jobs to count active crawler processes.
     * Used to enforce maximum concurrent crawler limits.
     *
     * @return the number of currently running crawler jobs
     */

          }
        });
  }

  /**
   * An immutable snapshot of the current state of the service. This class represents a consistent
   * snapshot of the state and therefore it can be used to answer simple queries without needing to
   * grab a lock.
   */
  // @Immutable except that Throwable is mutable (initCause(), setStackTrace(), mutable subclasses).
  private static final class StateSnapshot {
    /**

}

// adbCopyTree copies testdata, go.mod, go.sum files from subdir
// and from parent directories all the way up to the root of subdir.
// go.mod and go.sum files are needed for the go tool modules queries,
// and the testdata directories for tests.  It is common for tests to
// reach out into testdata from parent packages.
func adbCopyTree(deviceCwd, subdir string) error {
	dir := ""
	for {

    return new ImmutableSortedMap<K, V>(delegate, comparator);
  }

  /*
   * We don't permit nulls, but we wrap every comparator with nullsFirst().
   * Why? We want for queries like containsKey(null) to return false, but the
   * GWT SortedMap implementation that we delegate to throws
   * NullPointerException if the comparator does. Since our construction

   * enter this monitor. This method is designed primarily for use in monitoring of the system
   * state.
   */
  public boolean hasQueuedThreads() {
    return lock.hasQueuedThreads();
  }

  /**
   * Queries whether the given thread is waiting to enter this monitor. Note that because
   * cancellations may occur at any time, a {@code true} return does not guarantee that this thread