/**
     * Use a WeakHashMap here, so the keys (Class objects) can be garbage collected.
     * This approach prevents permgen space overflows due to retention of discarded
     * classloaders.
     */
    private static final Map<Class<?>, WeakReference<ClassMap>> CLASS_MAPS = new WeakHashMap<>();

    static final int EOF = -1;

    static final char PROPERTY_START = '.';

/**
 * Unit test for {@link FinalizableReferenceQueue}.
 *
 * @author Bob Lee
 */
// - depends on details of GC and classloading
// - .class files aren't available
// - possibly no real concept of separate ClassLoaders?
@AndroidIncompatible
@GwtIncompatible
@RunWith(JUnit4.class)
@NullUnmarked
public class FinalizableReferenceQueueTest {

  private @Nullable FinalizableReferenceQueue frq;

  @After

            <option value="$PROJECT_DIR$/platforms/core-runtime/build-profile" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/build-state" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/classloaders" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/cli" />
            <option value="$PROJECT_DIR$/platforms/core-runtime/client-services" />