if (edge == null) { // no edges - don't need this vertex anymore
                    if (entry.equals(v)) { // unless it's an entry point.
                        // currently processing the entry point - it should not have any entry incident edges
                        res.getEntry().getMd().setWhy("This is a graph entry point. No links.");
                    }
                } else {

that mutate that state. It maps the nodes of a dataflow graph across many machines in a cluster, and within a machine across multiple computational devices, including multicore CPUs, general purpose GPUs, and custom-designed ASICs known as Tensor Processing Units (TPUs). This architecture gives flexibility to the application developer, whereas in previous “parameter server” designs the management of shared state is built into the system, TensorFlow enables developers to experiment with novel optimizations...

 * <li>Field names and keys used throughout the application</li>
 * <li>Date/time format patterns</li>
 * <li>Authentication type identifiers</li>
 * <li>Reserved words and regex patterns for query processing</li>
 * </ul>
 */
public class Constants extends CoreLibConstants {

    /**
     * Private constructor to prevent instantiation of this utility class.

        CHILD_URLS,
        /** Indicates that a URL was evaluated for crawling eligibility. */
        EVALUATED,
        /** Indicates that a general exception occurred during processing. */
        EXCEPTION,
        /** Indicates that processing of a URL has finished. */
        FINISHED,
        /** Indicates that content was successfully parsed. */
        PARSED,
        /** Indicates that a URL was prepared for crawling. */

     * Each thread handles crawling for a single data configuration,
     * processing documents and updating the search index.
     *
     * <p>The thread manages:</p>
     * <ul>
     *   <li>Data store initialization and document processing</li>
     *   <li>Index update operations through callbacks</li>
     *   <li>Error handling and failure logging</li>

import jakarta.annotation.Resource;

/**
 * The {@code CrawlerThread} class represents a thread that executes the crawling process.
 * It is responsible for fetching URLs from the queue, accessing the content,
 * processing the response, and extracting child URLs.
 *
 * <p>
 * This class implements the {@link Runnable} interface, allowing it to be executed in a separate thread.

  /**
   * Returns the trailers after the HTTP response, which may be empty. This blocks until the
   * trailers are available to read.
   *
   * It is not safe to call this concurrently with code that is processing the response body. If you
   * call this without consuming the complete response body, any remaining bytes in the response
   * body will be discarded before trailers are returned.
   *

    @Resource
    protected AccessTokenService accessTokenService;

    /**
     * HTTP servlet request object providing access to request parameters, headers,
     * and other request-specific information needed for API processing.
     */
    @Resource
    protected HttpServletRequest request;

    /**
     * Returns an empty OptionalThing for login manager since API actions

  PrimitiveSink putUnencodedChars(CharSequence charSequence);

  /**
   * Puts a string into this sink using the given charset.
   *
   * <p><b>Warning:</b> This method, which reencodes the input before processing it, is useful only
   * for cross-language compatibility. For other use cases, prefer {@link #putUnencodedChars}, which
   * is faster, produces the same output across Java releases, and processes every {@code char} in

 * and request tracing capabilities.
 *
 * <p>Each request is associated with a {@link ProtoSession} that contains the configuration
 * and context necessary for request processing, including:
 * <ul>
 *   <li>User and system properties for interpolation</li>
 *   <li>Session start time information</li>
 *   <li>Project directory structures</li>
 * </ul>
 *