assertEquals(null, storedFileId);
    }

    @Test
    @DisplayName("setCloseFlags should update close flags")
    void testSetCloseFlags() throws Exception {
        int testFlags = 0x00000001; // SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB
        request.setCloseFlags(testFlags);

        Field closeFlagsField = Smb2CloseRequest.class.getDeclaredField("closeFlags");
        closeFlagsField.setAccessible(true);

        this.value = value;
    }
}
```

### 3.2 Handle Capabilities
```java
public class Smb2HandleCapabilities {
    // Durable handle flags
    public static final int SMB2_DHANDLE_FLAG_PERSISTENT = 0x00000002;
    
    // Timeout values (milliseconds)
    public static final long DEFAULT_DURABLE_TIMEOUT = 120000;  // 2 minutes
    public static final long MAX_DURABLE_TIMEOUT = 300000;      // 5 minutes

                handle = DcerpcHandle.getHandle("ncacn_np:" + authorityServerName + "[\\PIPE\\samr]", auth);
                policyHandle = new SamrPolicyHandle(handle, authorityServerName, 0x00000030);
                domainHandle = new SamrDomainHandle(handle, policyHandle, 0x00000200, domsid);
                return SID.getGroupMemberSids0(handle, domainHandle, domsid, getRid(), flags);
            } finally {
                if (handle != null) {