private static final ImmutableMap<String, Method> typeVariableMethods;

    static {
      ImmutableMap.Builder<String, Method> builder = ImmutableMap.builder();
      for (Method method : TypeVariableImpl.class.getMethods()) {
        if (method.getDeclaringClass().equals(TypeVariableImpl.class)) {
          try {
            method.setAccessible(true);
          } catch (AccessControlException e) {

import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Abstract test case parent for anything implementing {@link ListenableFuture}. Tests the two get
 * methods and the addListener method.
 *
 * @author Sven Mawson
 * @since 10.0
 */
@GwtIncompatible
public abstract class AbstractListenableFutureTest extends TestCase {

  protected CountDownLatch latch;

    final Method method;

    MethodInvokable(Method method) {
      super(method);
      this.method = method;
    }

    @Override
    @CheckForNull
    final Object invokeInternal(@CheckForNull Object receiver, @Nullable Object[] args)
        throws InvocationTargetException, IllegalAccessException {
      return method.invoke(receiver, args);
    }

    @Override

 * <h3>Extension</h3>
 *
 * If you want a class like {@code FluentFuture} but with extra methods, we recommend declaring your
 * own subclass of {@link ListenableFuture}, complete with a method like {@link #from} to adapt an
 * existing {@code ListenableFuture}, implemented atop a {@link ForwardingListenableFuture} that
 * forwards to that future and adds the desired methods.
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault

import java.util.concurrent.TimeUnit;

/**
 * Factory methods for {@link ExecutorService} for testing.
 *
 * @author Chris Nokleberg
 * @since 14.0
 */
@GwtIncompatible
public final class TestingExecutors {
  private TestingExecutors() {}

  /**
   * Returns a {@link ScheduledExecutorService} that never executes anything.
   *
   * <p>The {@code shutdownNow} method of the returned executor always returns an empty list despite

   * run finishes before the limit is reached, this method returns or a wrapped exception is
   * propagated. If, on the other hand, the time limit is reached, we attempt to abort the run, and
   * throw a {@link TimeoutException} to the caller.
   *
   * <p>The difference with {@link #runWithTimeout(Runnable, long, TimeUnit)} is that this method
   * will ignore interrupts on the current thread.

import com.google.common.testing.ForwardingWrapperTester;
import java.lang.reflect.Method;
import java.util.Arrays;

/**
 * Tester for typical subclass of {@link ForwardingObject} by using Mockito.
 *
 * @author Ben Yu
 */
final class ForwardingObjectTester {

  private static final Method DELEGATE_METHOD;

  static {
    try {

    public MetadataXpp3Writer() {
        delegate = new MetadataStaxWriter();
    }

    /**
     * Method setFileComment.
     *
     * @param fileComment a fileComment object.
     */
    public void setFileComment(String fileComment) {
        delegate.setFileComment(fileComment);
    }

    /**
     * Method write.
     *
     * @param writer   a writer object
     * @param metadata a Metadata object

    try {
      // From org.conscrypt.TrustManagerImpl, we want the method with this signature:
      // private TrustAnchor findTrustAnchorByIssuerAndSignature(X509Certificate lastCert);
      val method =
        trustManager.javaClass.getDeclaredMethod(
          "findTrustAnchorByIssuerAndSignature",
          X509Certificate::class.java,
        )
      method.isAccessible = true
      CustomTrustRootIndex(trustManager, method)

 *
 * <p>{@code ByteSource} provides two kinds of methods:
 *
 * <ul>
 *   <li><b>Methods that return a stream:</b> These methods should return a <i>new</i>, independent
 *       instance each time they are called. The caller is responsible for ensuring that the
 *       returned stream is closed.
 *   <li><b>Convenience methods:</b> These are implementations of common operations that are