addFieldToSource(sourceMap, "virtualHost", virtualHost);
        }
        return sourceMap;
    }

    protected void addFieldToSource(Map<String, Object> sourceMap, String field, Object value) {
        sourceMap.put(field, value);
    }

    // ===================================================================================
    //                                                                      Basic Override

        int unknownClass = 1234;
        String expected = "unknown error class: 1234";
        assertEquals(expected, NbtException.getErrorString(unknownClass, 0));
    }

    @Test
    @DisplayName("Constructor sets fields and message correctly")
    void testConstructor() {
        NbtException e = new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);
        assertEquals(NbtException.ERR_SSN_SRVC, e.errorClass);

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.tls.internal.der

/**
 * The first two bytes of each value is a header that includes its tag (field ID) and length.
 */
internal data class DerHeader(
  /**
   * Namespace of the tag.
   *
   * This value is encoded in bits 7 and 8 of the first byte of each value.
   *
   * ```
   * 0b00xxxxxx Universal

            addFieldToSource(sourceMap, "name", name);
        }
        return sourceMap;
    }

    protected void addFieldToSource(Map<String, Object> sourceMap, String field, Object value) {
        sourceMap.put(field, value);
    }

    // ===================================================================================
    //                                                                      Basic Override

              }
            }
          }

          when {
            headerIndex != -1 -> {
              // Indexed Header Field.
              writeInt(headerIndex, PREFIX_7_BITS, 0x80)
            }
            headerNameIndex == -1 -> {
              // Literal Header Field with Incremental Indexing - New Name.
              out.writeByte(0x40)
              writeByteString(name)
              writeByteString(value)

void cleanup(String sessionId)  // Clean up session
void stop()                     // Stop gracefully
```

**Key Fields**: `crawlerContext`, `urlFilter`, `intervalController`, `clientFactory`, `ruleManager`

### CrawlerContext (`CrawlerContext.java`)

Execution context and configuration.

**Important Fields**:
```java
String sessionId                // Format: yyyyMMddHHmmssSSS
volatile CrawlerStatus status   // DONE, RUNNING

            addFieldToSource(sourceMap, "url", url);
        }
        return sourceMap;
    }

    protected void addFieldToSource(Map<String, Object> sourceMap, String field, Object value) {
        sourceMap.put(field, value);
    }

    // ===================================================================================
    //                                                                      Basic Override

                                    </la:info>
                                    <la:errors/>
                                </div>
                                    <%-- Form Fields --%>
                                <table class="table table-bordered" aria-label="<la:message key="labels.group_details" />">
                                    <tbody>
                                    <tr>

 *
 * See [RFC 7234, 5.2](https://tools.ietf.org/html/rfc7234#section-5.2).
 */
class CacheControl internal constructor(
  /**
   * In a response, this field's name "no-cache" is misleading. It doesn't prevent us from caching
   * the response; it only means we have to validate the response with the origin server before
   * returning it. We can do this with a conditional GET.
   *

            // We need to override the parent ServerMessageBlock2's encode
            // to properly simulate setting the length field
            int start = dstIndex;
            dstIndex += writeHeaderWireFormat(dst, dstIndex);
            dstIndex += writeBytesWireFormat(dst, dstIndex);

            // Set the length field that will be checked by ServerMessageBlock2Request.encode()
            int calculatedLength = testEncodedLength;