This release stabilizes many APIs for the imminent OkHttp 5.0.0 release.

 *  New: `TrailersSource`, a public API for HTTP trailers. Production callers shouldn't need this
    as the API to read response trailers is unchanged. Testers may use this new stable API to
    supply trailers for a `Response`.

 *  New: `Path.asRequestBody()` is now a non-experimental API.

 *  New: `FileDescriptor.toRequestBody()` is now a non-experimental API.

import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
import static com.google.common.collect.testing.features.CollectionFeature.RESTRICTS_ELEMENTS;
import static com.google.common.collect.testing.testers.NavigableSetNavigationTester.getHoleMethods;
import static com.google.common.testing.SerializableTester.reserialize;
import static com.google.common.testing.SerializableTester.reserializeAndAssert;

    @Mock
    private Smb2WriteResponse mockWriteResponse;

    private SmbFileOutputStream outputStream;

    @BeforeEach
    void setUp() {
        // Common setup for most tests
        lenient().when(mockFileHandle.getTree()).thenReturn(mockTreeHandle);
        lenient().when(mockTreeHandle.getConfig()).thenReturn(mockConfig);
    }

    @Test

    }

    @Test
    public void testInvalidUncPath() throws Exception {
        // Due to normalization removing duplicate backslashes, true UNC validation doesn't work
        // These tests validate current behavior where problematic paths are caught by other checks

        // Test invalid server name with dots - caught by directory traversal check
        assertThrows(SmbException.class, () -> {

  private @Nullable Throwable thrown;

  @VisibleForTesting
  Closer(Suppressor suppressor) {
    this.suppressor = checkNotNull(suppressor); // checkNotNull to satisfy null tests
  }

  /**
   * Registers the given {@code closeable} to be closed when this {@code Closer} is {@linkplain
   * #close closed}.
   *
   * @return the given {@code closeable}
   */

}

public boolean isWitnessServiceDiscovery() {
    return getBooleanProperty(WITNESS_SERVICE_DISCOVERY, true);
}
```

## 7. Testing Strategy

### 7.1 Unit Tests
```java
@Test
public void testWitnessRegistration() {
    WitnessRegistration registration = new WitnessRegistration(
        "\\\\server\\share", 
        InetAddress.getByName("192.168.1.100"),

import java.util.Objects;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Collections2}.
 *
 * @author Chris Povirk
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public class Collections2Test extends TestCase {
  @J2ktIncompatible
  @GwtIncompatible // suite

        inputList.clear();
        assertEquals(2, notifications.size());

        // Try to modify returned list - behavior depends on implementation
        // This tests that the implementation properly handles list modifications
        try {
            notifications.clear();
            // If this succeeds, the implementation allows modification

    private NetServerEnum2 netServerEnum2;
    private Configuration realConfig;

    @BeforeEach
    void setUp() throws Exception {
        MockitoAnnotations.openMocks(this);
        // Use real configuration for most tests
        realConfig = new BaseConfiguration(false);
        // Mock configuration setup
        when(mockConfig.getTransactionBufferSize()).thenReturn(65535);
    }

    @Test

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Unit tests on <code>MavenProperties</code>.
 */
@Deprecated
public class MavenPropertiesTest {

    private static final String LINE_SEPARATOR = System.getProperty("line.separator");