[TestFS] now returns a structured error that can be unwrapped
(via method `Unwrap() []error`). This allows inspecting errors

            val originalFirSymbol = firSymbol.fir.originalConstructorIfTypeAlias?.symbol ?: firSymbol
            val unwrapped = originalFirSymbol.originalIfFakeOverride() ?: originalFirSymbol
            return symbolsCache.cache(unwrapped) {
                KaFirConstructorSymbol(unwrapped, analysisSession)
            }
        }

     */
    boolean isOpen ();


    /**
     * @return whether the FD was previously open but became invalid
     */
    boolean isStale ();


    /**
     * @param type
     * @return unwrapped instance
     */
    <T extends SmbPipeHandle> T unwrap ( Class<T> type );

/**
 * Interface for opaque credential data
 * 
 * @author mbechler
 *
 */
public interface Credentials {

    /**
     * 
     * @param type
     * @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Credentials> T unwrap ( Class<T> type );


    /**
     * @return the domain the user account is in
     */
    String getUserDomain ();


    /**

 * 
 * @author mbechler
 *
 */
public interface Address {

    /**
     * 
     * @param type
     * @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Address> T unwrap ( Class<T> type );


    /**
     * 
     * @return the resolved host name, or the host address if it could not be resolved
     */
    String getHostName ();

// in the plugin for Variant data types. The API takes in the context and a
// callback provided by pluggable vendor to do a Binary Add operation on the
// tensors unwrapped from the Variant tensors. The caller takes ownership of the
// `a`, `b` and `out` tensors and is responsible for freeing them with
// TF_DeleteTensor.
TF_CAPI_EXPORT extern void TF_AddNVariant(
    TF_OpKernelContext* ctx,

     *
     * Note: always throws the failure in some form. The return value is to keep the compiler happy.
     *
     * @param e to be unwrapped
     * @return an instance of RuntimeException based on the target exception of the parameter.
     */
    public static RuntimeException unwrapAndRethrow(InvocationTargetException e) {

     * <td>Unknown</td>
     * </tr>
     * </table>
     * 
     * @return type code
     */
    int getType ();


    /**
     * 
     * @param type
     * @return unwrapped instance
     */
    public <T> T unwrap ( Class<T> type );

			}
		}
		return a, nil
	}
}

type resolverDialHandler struct {
	// StartDial, if non-nil, is called when Go first calls Resolver.Dial.
	// Any error returned aborts the dial and is returned unwrapped.
	StartDial func(network, address string) error

	Question func(dnsmessage.Header, dnsmessage.Question)

	// err may be ErrNotExist or ErrRefused; others map to SERVFAIL (RCode2).
	// A nil error means success.

      type_ = NONE;
    }
  }
  ~TaggedValue() { destroy(); }

  /// @brief Get the underlying value based on type.
  ///
  /// @tparam T The desired return type.
  /// @return The unwrapped value. If this `TaggedValue` type does not currently
  ///         contain a value of type `T`, the program terminates via a call to
  ///         `assert`.
  template <typename T>
  T& get() {