final String value = dataMap.get(key);
        if (StringUtil.isBlank(value)) {
            return defaultValue;
        }
        return value;
    }

    /**
     * Executes the actual crawling operations based on the provided options.
     * This method coordinates web/file system crawling and data store crawling,
     * running them in parallel threads when multiple types are requested.
     *

        SMBUtil.writeInt8(1000000, buffer, 20); // Total allocation units
        SMBUtil.writeInt8(500000, buffer, 28); // Caller available units
        SMBUtil.writeInt8(600000, buffer, 36); // Actual available units
        SMBUtil.writeInt4(512, buffer, 44); // Sectors per unit
        SMBUtil.writeInt4(4096, buffer, 48); // Bytes per sector

        int result = response.readBytesWireFormat(buffer, bufferIndex);

        int wireCommentOffset = actualCommentOffset + converterValue;
        SMBUtil.writeInt4(wireCommentOffset, buffer, bufferIndex);
        bufferIndex += 4;

        // Write comment at actual offset
        byte[] commentBytes = comment.getBytes(StandardCharsets.US_ASCII);
        System.arraycopy(commentBytes, 0, buffer, actualCommentOffset, commentBytes.length);

	handlerName := getHandlerName(f, "objectAPIHandlers")

	var handler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
		w = &trackingResponseWriter{ResponseWriter: w}

		// Wrap the actual handler with the appropriate tracing middleware.
		var tracedHandler http.HandlerFunc
		if handlerFlags.has(traceHdrsS3HFlag) {
			tracedHandler = httpTraceHdrs(f)
		} else {
			tracedHandler = httpTraceAll(f)
		}

public abstract class ServerMessageBlock2 implements CommonServerMessageBlock {

    /*
     * These are all the smbs supported by this library. This includes requests
     * and well as their responses for each type however the actual implementations
     * of the readXxxWireFormat and writeXxxWireFormat methods may not be in
     * place. For example at the time of this writing the readXxxWireFormat

   */
  private static final long UNEXPECTED_HANG_DELAY_MILLIS = 10000;

  /**
   * Various scenarios to be generated for each method under test. The actual scenario generation
   * (determining which scenarios are applicable to which methods and what the outcome should be)
   * takes place in {@link #addTests(TestSuite, Method)}.
   */
  private enum Scenario {

```

   * up the necessary in-memory cache information.
   *
   * The initialization time may vary depending on the journal file size and the current actual
   * cache size. The application needs to be aware of calling this function during the
   * initialization phase and preferably in a background worker thread.
   *

I'll show you some concrete examples in the next chapters.

---

Then the next concepts to consider are all about the program running your actual API (e.g. Uvicorn).

## Program and Process { #program-and-process }

We will talk a lot about the running "**process**", so it's useful to have clarity about what it means, and what's the difference with the word "**program**".

   * can't be constructed at all.)
   *
   * <p>Note that certain discrete ranges such as the integer range {@code (3..4)} are <b>not</b>
   * considered empty, even though they contain no actual values. In these cases, it may be helpful
   * to preprocess ranges with {@link #canonical(DiscreteDomain)}.
   */
  public boolean isEmpty() {
    return lowerBound.equals(upperBound);
  }

  /**