_, _, err = r.ReadRune() // reset state
	if err != nil {
		t.Error("unexpected error on ReadRune (2):", err)
	}
	_, err = r.Read(buf)
	if err != nil {
		t.Error("unexpected error on Read (2):", err)
	}
	if r.UnreadRune() == nil {
		t.Error("expected error after Read (2)")
	}
	// Test error after ReadByte.
	_, _, err = r.ReadRune() // reset state
	if err != nil {

            }

            this.isExists = true;
            return fh;
        }
    }

    /**
     * Determines the appropriate lease state based on the requested access
     *
     * @param access the desired access flags
     * @return the appropriate lease state
     */
    private int determineLeaseState(final int access) {
        // Check if this is a directory
        boolean isDir = false;
        try {

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  /**
   * Returns the single element contained in {@code iterator}.
   *
   * @throws NoSuchElementException if the iterator is empty
   * @throws IllegalArgumentException if the iterator contains multiple elements. The state of the
   *     iterator is unspecified.
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T getOnlyElement(Iterator<T> iterator) {
    T first = iterator.next();
    if (!iterator.hasNext()) {