try {
            Integer result = (Integer) processMethod.invoke(null, options);
            assertNotNull(result);
            // Verify that generate was called at least once
            assertTrue(generateCallCount.get() >= 0);
        } catch (Exception e) {
            // Expected behavior when components are not fully initialized

       * If another handleException() caller created the set, we need to use that copy in case yet
       * other callers have added to it.
       *
       * This read is guaranteed to get us the right value because we only set this once (here).
       *
       * requireNonNull is safe because either our compareAndSet succeeded or it failed because
       * another thread did it for us.
       */

      destIndex = sizeNeeded;
    }
    return new String(dest, 0, destIndex);
  }

  /**
   * Helper method to grow the character buffer as needed, this only happens once in a while so it's
   * ok if it's in a method call. If the index passed in is 0 then no copying will be done.
   */
  private static char[] growBuffer(char[] dest, int index, int size) {

        iterator.close();
        iterator.close(); // Second close should be safe

        // Then: Tree handle should be released only once
        verify(treeHandle, times(1)).release();
    }

    @Test
    @DisplayName("Iterator should handle filter that rejects all entries")
    void testIterator_FilterRejectsAll() throws Exception {

 * Note that this means a test should not require more than one CollectionSize, since a particular
 * collection instance can only be one size at once.
 *
 * @author George van den Driessche
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
@GwtCompatible

 *       have, of returning a new, independent iterator
 * </ul>
 *
 * <p>Because of this situation, any public method accepting an iterable should invoke the {@code
 * iterator} method only once, and should be tested using this class. Exceptions to this rule should
 * be clearly documented.
 *
 * <p>Note that although your APIs should be liberal in what they accept, your methods which

 * Note that this means a test should not require more than one CollectionSize, since a particular
 * collection instance can only be one size at once.
 *
 * @author George van den Driessche
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
@GwtCompatible

    protected @Nullable Object handleInvocation(
        Object p, Method calledMethod, @Nullable Object[] args) throws Throwable {
      assertEquals(method, calledMethod);
      assertEquals(method + " invoked more than once.", 0, called.get());
      for (int i = 0; i < passedArgs.length; i++) {
        assertEquals(
            "Parameter #" + i + " of " + method + " not forwarded", passedArgs[i], args[i]);
      }

- JAVA 1.8 and above installed already and JAVA_HOME points to JAVA 1.8 installation.
- Download WSO2 follow their [installation guide](https://docs.wso2.com/display/IS540/Installation+Guide).

### 2. Configure WSO2

Once WSO2 is up and running, configure WSO2 to generate Self contained id_tokens. In OAuth 2.0 specification there are primarily two ways to provide id_tokens

   *  * *m* bytes: metadata
   *
   * This is closed and assigned to null when the last source is closed and no further sources
   * are permitted.
   */
  var file: RandomAccessFile?,
  /**
   * Null once the file has a complete copy of the upstream bytes. Only the [upstreamReader] thread
   * may access this source.
   */
  var upstream: Source?,
  /** The number of bytes consumed from [upstream]. Guarded by this. */