protected String charset = Constants.UTF_8;

    /** Helper for managing content length limits */
    @Resource
    protected ContentLengthHelper contentLengthHelper;

    /** Flag to track initialization status */
    protected AtomicBoolean isInit = new AtomicBoolean(false);

    /**
     * Constructs a new FileSystemClient.
     */
    public FileSystemClient() {
        // Default constructor

    throw new UnsupportedOperationException();
  }

  /**
   * {@inheritDoc}
   *
   * <p>This implementation of {@code getAllPresent} lacks any insight into the internal cache data
   * structure, and is thus forced to return the query keys instead of the cached keys. This is only
   * possible with an unsafe cast which requires {@code keys} to actually be of type {@code K}.

import org.opensearch.search.aggregations.bucket.terms.TermsAggregationBuilder;

/**
 * Helper class for managing crawling information and statistics.
 * Provides functionality to track crawling sessions, manage document expiration,
 * and handle crawling information storage and retrieval.
 */
public class CrawlingInfoHelper {

    /**
     * Creates a new instance of CrawlingInfoHelper.
     */

        assertNotNull(mainStackTrace);
        assertNotNull(causeStackTrace);
        assertTrue(mainStackTrace.length > 0);
        assertTrue(causeStackTrace.length > 0);

        // Stack traces should be different
        assertNotSame(mainStackTrace, causeStackTrace);
    }

    /**
     * Test printStackTrace functionality
     */
    public void test_printStackTrace() {

### EventListener.Factory

        when(fe2.getFileIndex()).thenReturn(2);

        FileEntry fe3 = mock(FileEntry.class);
        lenient().when(fe3.getName()).thenReturn("file3");
        when(fe3.getFileIndex()).thenReturn(3);

        // Track query count to handle multiple queries properly
        final int[] queryCount = { 0 };

        // Mock send(create) to wire a query response with fe1, fe2
        doAnswer(inv -> {

  @VisibleForTesting transient @Nullable Object @Nullable [] values;

  /**
   * Keeps track of metadata like the number of hash table bits and modifications of this data
   * structure (to make it possible to throw ConcurrentModificationException in the iterator). Note
   * that we choose not to make this volatile, so we do less of a "best effort" to track such
   * errors, for better performance.
   *

      targetCompatibility = projectJavaVersion.toString()
    }
  }
}

subprojects {
  // From https://www.liutikas.net/2025/01/12/Kotlin-Library-Friends.html

    // Create configurations we can use to track friend libraries
  configurations {
    val friendsApi = register("friendsApi") {
      isCanBeResolved = true
      isCanBeConsumed = false
      isTransitive = true
    }

#### Per-Connection Locks

Each connection has its own lock. The connections in the pool are all in a `ConcurrentLinkedQueue`. Due to data races, iterators of this queue may return removed connections. Callers must check the connection's `noNewExchanges` property before using connections from the pool.

        // Then
        assertArrayEquals(testFileId, customRequest.getFileId(), "Custom implementation should store file ID correctly");
        assertEquals(1, customRequest.getSetCount(), "Should track set count correctly");
    }