/**
         * Verifies that isStale returns false for a fresh handle.
         */
        @Test
        public void testIsStale_ReturnsFalseWhenNotStale() {
            when(smbPipeHandle.isStale()).thenReturn(false);
            assertFalse(smbPipeHandle.isStale(), "isStale() should return false for a fresh handle.");
        }

        /**
         * Verifies that isStale returns true for a stale handle.
         */

    boolean isOpen();

    /**
     * Tests whether this file descriptor was previously open but has become invalid.
     *
     * @return whether the FD was previously open but became invalid
     */
    boolean isStale();

    /**
     * Unwraps this handle to the specified type.
     *
     * @param <T> the type to unwrap to
     * @param type the class of the type to unwrap to
     * @return unwrapped instance
     */

     */
    @Override
    protected int doSendReceiveFragment(final byte[] buf, final int off, final int length, final byte[] inB) throws IOException {
        if (this.handle.isStale()) {
            throw new IOException("DCERPC pipe is no longer open");
        }

        int have = this.handle.sendrecv(buf, off, length, inB, getMaxRecv());