* is serviced. The alternative complicates things
             * more than I think is worth it.
             */

            if (socket != null) {
                socket.close();
                socket = null;
            }
            thread = null;
            responseTable.clear();
        }
    }

    @Override
    public void run() {
        int nameTrnId;

    /** The Kerberos subject for authentication */
    private Subject subject = null;
    /** The user principal name */
    private String user = null;
    /** The Kerberos realm */
    private String realm = null;
    /** The service principal name */
    private String service = DEFAULT_SERVICE;
    /** The user credential lifetime */

  public void testContainsEntryNullYes() {
    initMultimapWithNullKeyAndValue();
    assertTrue(multimap().containsEntry(null, null));
  }

  @MapFeature.Require({ALLOWS_NULL_KEY_QUERIES, ALLOWS_NULL_VALUE_QUERIES})
  public void testContainsEntryNullNo() {
    assertFalse(multimap().containsEntry(null, null));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)

                treeResponse.service = "testService";
                treeResponse.shareIsInDfs = true;
            }
            return null;
        }).when(session).send(any(ServerMessageBlock.class), any(ServerMessageBlock.class));

        // Test tree connect
        tree.treeConnect(null, null);

        assertEquals(2, tree.connectionState);
        assertEquals(456, tree.tid);

@Throws(EOFException::class)
private fun Buffer.readChallengeHeader(result: MutableList<Challenge>) {
  var peek: String? = null

  while (true) {
    // Read a scheme name for this challenge if we don't have one already.
    if (peek == null) {
      skipCommasAndWhitespace()
      peek = readToken()
      if (peek == null) return
    }

    val schemeName = peek

    // Read a token68, a sequence of parameters, or nothing.

```

### Type Conversion
```java
import org.codelibs.core.convert.*;

// Safe type conversions with null handling
Integer value = IntegerConversionUtil.toInteger("123");        // Returns 123
Integer nullValue = IntegerConversionUtil.toInteger(null);     // Returns null
Boolean flag = BooleanConversionUtil.toBoolean("true");        // Returns true
Date date = DateConversionUtil.toDate("2023-12-25", "yyyy-MM-dd");

        assertNull(ex.getCause(), "Cause should be null when only message is provided");

        // toString should include the class name and (if non-null) the message
        String ts = ex.toString();
        assertTrue(ts.contains("SMBProtocolDecodingException"), "toString should include class name");
        if (message != null && !message.isEmpty()) {

    assertThat(expected).hasMessageThat().isEqualTo("null");
  }

  public void testCheckArgument_nullMessageWithArgs_failure() {
    IllegalArgumentException e =
        assertThrows(IllegalArgumentException.class, () -> checkArgument(false, null, "b", "d"));
    assertThat(e).hasMessageThat().isEqualTo("null [b, d]");
  }

    assertThat(expected).hasMessageThat().isEqualTo("null");
  }

  public void testCheckArgument_nullMessageWithArgs_failure() {
    IllegalArgumentException e =
        assertThrows(IllegalArgumentException.class, () -> checkArgument(false, null, "b", "d"));
    assertThat(e).hasMessageThat().isEqualTo("null [b, d]");
  }

    }

    public void myspecifyPropertyCancel(String propertyName) {
        if (__specifiedProperties != null) {
            __specifiedProperties.remove(propertyName);
        }
    }

    public void clearSpecifiedInfo() {
        if (__specifiedProperties != null) {
            __specifiedProperties.clear();
        }
    }

    protected void checkSpecifiedProperty(String propertyName) {