When a filter changes and includes/removes new objects, those are automatically handled.
* Proper syncing and shutdown logic. Checking for when an informer has fully started can be quite tricky; `kclient` automatically handles it.

Under the `kclient` package, `clienttest` also provides similar interfaces meant for writing unit tests.

    MapMakerInternalMap<Object, Object, ?, ?> map =
        makeMap(createMapMaker().concurrencyLevel(1).weakValues());
    Segment<Object, Object, ?, ?> segment = map.segments[0];
    // TODO(fry): check recency ordering

    Object key = new Object();
    int hash = map.hash(key);
    Object value = new Object();
    AtomicReferenceArray<? extends InternalEntry<Object, Object, ?>> table = segment.table;

    MapMakerInternalMap<Object, Object, ?, ?> map =
        makeMap(createMapMaker().concurrencyLevel(1).weakValues());
    Segment<Object, Object, ?, ?> segment = map.segments[0];
    // TODO(fry): check recency ordering

    Object key = new Object();
    int hash = map.hash(key);
    Object value = new Object();
    AtomicReferenceArray<? extends InternalEntry<Object, Object, ?>> table = segment.table;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.function.BiPredicate;
import java.util.stream.Collector;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tester for {@code Collector} implementations.
 *
 * <p>Example usage:
 *
 * <pre>
 * CollectorTester.of(Collectors.summingInt(Integer::parseInt))

  /*
   * J2CL's EnumMap does not need the Class instance, so we can use Object.class instead. (Or we
   * could use null, but that messes with our nullness checking, including under J2KT. We could
   * probably work around it by changing how we annotate the J2CL EnumMap, but that's probably more
   * trouble than just using Object.class.)
   *

package com.google.common.collect;

import java.util.ArrayDeque;
import java.util.Collection;
import java.util.Deque;
import java.util.Iterator;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@link Synchronized#deque} and {@link Queues#synchronizedDeque}.
 *
 * @author Kurt Alfred Kluever
 */
public class SynchronizedDequeTest extends TestCase {

  /*
   * J2CL's EnumMap does not need the Class instance, so we can use Object.class instead. (Or we
   * could use null, but that messes with our nullness checking, including under J2KT. We could
   * probably work around it by changing how we annotate the J2CL EnumMap, but that's probably more
   * trouble than just using Object.class.)
   *

import java.util.Collection;
import java.util.Comparator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.SortedSet;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A {@code SetMultimap} whose set of values for a given key are kept sorted; that is, they comprise
 * a {@link SortedSet}. It cannot hold duplicate key-value pairs; adding a key-value pair that's

  // valid against the audience of the Kubernetes API server.
  // +optional
  repeated string audiences = 4;

  // Error indicates that the token couldn't be checked
  // +optional
  optional string error = 3;
}

// UserInfo holds the information about the user needed to implement the
// user.Info interface.
message UserInfo {

		return true
	}
	return false
}

// IsEncrypted returns true if the object metadata indicates
// that it was uploaded using some form of server-side-encryption.
//
// IsEncrypted only checks whether the metadata contains at least
// one entry indicating SSE-C or SSE-S3.
func IsEncrypted(metadata map[string]string) (Type, bool) {
	if S3KMS.IsEncrypted(metadata) {
		return S3KMS, true
	}