```

### 2. Create a sample OPA Policy

In another terminal, create a policy that allows root user all access and for all other users denies `PutObject`:

```sh
cat > example.rego <<EOF
package httpapi.authz

import input

default allow = false

# Allow the root user to perform any action.
allow {
 input.owner == true
}

# All other users may do anything other than call PutObject

   *
   * <p>This fit minimizes the root-mean-square error in {@code y} as a function of {@code x}. This
   * error is defined as the square root of the mean of the squares of the differences between the
   * actual {@code y} values of the data and the values predicted by the fit for the {@code x}
   * values (i.e. it is the square root of the mean of the squares of the vertical distances between

	switch cache.Info.Name {
	case "", dataUsageRoot:
		return cache, errors.New("internal error: root scan attempted")
	}
	basePath := drive.drivePath
	updatePath, closeDisk := globalScannerMetrics.currentPathUpdater(basePath, cache.Info.Name)
	defer closeDisk()

	s := folderScanner{
		root:                  basePath,
		getSize:               getSize,
		oldCache:              cache,

        // Scenario: DFS is disabled.
        when(mockConfig.isDfsDisabled()).thenReturn(true);
        assertNull(dfsImpl.resolve(mockContext, "domain", "root", "/path"));
    }

    @Test
    void testResolve_NullRoot() throws SmbAuthException {
        // Scenario: The root is null.
        assertNull(dfsImpl.resolve(mockContext, "domain", null, "/path"));
    }

    @Test

     * Indicates a target set boundary in the referral response.
     */
    public static final int FLAGS_TARGET_SET_BOUNDARY = 0x0004;
    /**
     * Indicates root targets in the DFS referral.
     */
    public static final int TYPE_ROOT_TARGETS = 0x0;
    /**
     * Indicates non-root targets in the DFS referral.
     */
    public static final int TYPE_NON_ROOT_TARGETS = 0x1;

 * roots on a server using the NetDFS RPC interface.
 */
public class MsrpcDfsRootEnum extends netdfs.NetrDfsEnumEx {

    /**
     * Creates a new DFS root enumeration request for the specified server.
     *
     * @param server the server name to enumerate DFS roots from
     */
    public MsrpcDfsRootEnum(final String server) {

				wg.Wait()
				// Flatten for upstream, but save full state.
				var root dataUsageEntry
				if r := cache.root(); r != nil {
					root = cache.flatten(*r)
				}
				select {
				case <-ctx.Done():
					return
				case bucketResults <- dataUsageEntryInfo{
					Name:   cache.Info.Name,
					Parent: dataUsageRoot,
					Entry:  root,
				}:
				}

				// Save cache

     */
    public TransportException(final String msg, final Throwable rootCause) {
        super(msg, rootCause);
    }

    /**
     * Gets the root cause of this exception.
     * @return root cause of this exception
     */
    @Deprecated
    public Throwable getRootCause() {
        return getCause();
    }

     */
    @Nonnull
    default DependencyResolverResult collect(
            @Nonnull Session session, @Nonnull DependencyCoordinates root, @Nonnull PathScope scope) {
        return collect(
                DependencyResolverRequest.build(session, DependencyResolverRequest.RequestType.COLLECT, root, scope));
    }

    /**
     * Collects the transitive dependencies of some artifacts and builds a dependency graph for the given path scope.

        // Create a root cause exception
        RuntimeException rootCause = new RuntimeException("Root cause error");
        TransportException exception = new TransportException(rootCause);

        // Verify the exception has the correct cause
        assertNotNull(exception);
        assertEquals(rootCause, exception.getCause());
        assertEquals("java.lang.RuntimeException: Root cause error", exception.getMessage());