private final List<PerListenerQueue<L>> listeners =
      Collections.synchronizedList(new ArrayList<PerListenerQueue<L>>());

  /** Method reference-compatible listener event. */
  interface Event<L> {
    /** Call a method on the listener. */
    void call(L listener);
  }

  /**
   * Adds a listener that will be called using the given executor when events are later {@link

 *
 * <p>The {@link #get}, {@link #removeAll}, and {@link #replaceValues} methods each return a {@link
 * SortedSet} of values, while {@link Multimap#entries()} returns a {@link Set} of map entries.
 * Though the method signature doesn't say so explicitly, the map returned by {@link #asMap} has
 * {@code SortedSet} values.
 *

 *
 * <p>The following types of methods are provided:
 *
 * <ul>
 *   <li>chaining methods which return a new {@code FluentIterable} based in some way on the
 *       contents of the current one (for example {@link #transform})
 *   <li>element extraction methods which facilitate the retrieval of certain elements (for example
 *       {@link #last})

import org.apache.logging.log4j.Logger;

/**
 * Factory class for managing and organizing document ingesters.
 * The factory maintains a sorted collection of ingesters based on their priority
 * and provides methods to add new ingesters and retrieve the current collection.
 *
 * Ingesters are automatically sorted by priority, with lower numbers having higher priority.
 */
public class IngestFactory {

import com.google.common.base.Preconditions;
import java.util.concurrent.Executor;
import org.jspecify.annotations.Nullable;

/**
 * A {@link ListenableFuture} which forwards all its method calls to another future. Subclasses
 * should override one or more methods to modify the behavior of the backing future as desired per
 * the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *

     * was called, in which case entries are sorted by value.
     *
     * <p>Prefer the equivalent method {@link #buildOrThrow()} to make it explicit that the method
     * will throw an exception if there are duplicate keys or values. The {@code build()} method
     * will soon be deprecated.
     *
     * @throws IllegalArgumentException if duplicate keys or values were added
     */
    @Override

 * be no logging set up even. Implementations may be "accumulating", in which case {@link #drain()}  method should
 * be used.
 * <p>
 * This interface provides methods for logging messages at different severity levels
 * and supports logging with or without associated exceptions.
 *
 * @since 4.0.0
 */
@Experimental
public interface Logger {

 *
 * <p>The table's size is constant: the product of the number of supplied row keys and the number of
 * supplied column keys. The {@code remove} and {@code clear} methods are not supported by the table
 * or its views. The {@link #erase} and {@link #eraseAll} methods may be used instead.
 *
 * <p>The ordering of the row and column keys provided when the table is constructed determines the

class FreshValueGenerator {

  private static final ImmutableMap<Class<?>, Method> GENERATORS;

  static {
    ImmutableMap.Builder<Class<?>, Method> builder = ImmutableMap.builder();
    for (Method method : FreshValueGenerator.class.getDeclaredMethods()) {
      if (method.isAnnotationPresent(Generates.class)) {
        builder.put(method.getReturnType(), method);
      }
    }
    GENERATORS = builder.buildOrThrow();
  }

import java.util.Locale;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * <p>This class is emulated in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible
final class Platform {
  static <T> T[] clone(T[] array) {
    return array.clone();
  }

  // Class.cast is not supported in GWT.  This method is a no-op in GWT.