colons := strings.Count(host, ":")
	if colons == 0 {
		return false
	}
	if colons == 1 {
		return true
	}
	return host[0] == '[' && strings.Contains(host, "]:")
}

// jarKey returns the key to use for a jar.
func jarKey(host string, psl PublicSuffixList) string {
	if isIP(host) {
		return host
	}

	var i int
	if psl == nil {
		i = strings.LastIndex(host, ".")
		if i <= 0 {
			return host

	".net":          ".net",
	"a.":            "a.",
	"b.a.":          "a.",
	"weird.stuff..": ".",
}

func TestJarKey(t *testing.T) {
	for host, want := range jarKeyTests {
		if got := jarKey(host, testPSL{}); got != want {
			t.Errorf("%q: got %q, want %q", host, got, want)
		}
	}
}

var jarKeyNilPSLTests = map[string]string{
	"foo.www.example.com": "example.com",

typedef jobject jclass;
typedef jobject jthrowable;
typedef jobject jstring;
typedef jobject jarray;
typedef jarray jbooleanArray;
typedef jarray jbyteArray;
typedef jarray jcharArray;
typedef jarray jshortArray;
typedef jarray jintArray;
typedef jarray jlongArray;
typedef jarray jfloatArray;
typedef jarray jdoubleArray;
typedef jarray jobjectArray;

typedef jobject jweak;

import java.util.Arrays;
import java.util.Map.Entry;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@link ImmutableMultimap}.
 *
 * @author Jared Levy
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class ImmutableMultimapTest extends TestCase {

  public void testBuilder_withImmutableEntry() {

	"jthrowable":    "jobject",
	"jstring":       "jobject",
	"jarray":        "jobject",
	"jbooleanArray": "jarray",
	"jbyteArray":    "jarray",
	"jcharArray":    "jarray",
	"jshortArray":   "jarray",
	"jintArray":     "jarray",
	"jlongArray":    "jarray",
	"jfloatArray":   "jarray",
	"jdoubleArray":  "jarray",
	"jobjectArray":  "jarray",
	"jweak":         "jobject",

			<artifactId>javax.transaction-api</artifactId>
			<version>${javax.transaction.api.version}</version>
		</dependency>
		<dependency>
			<groupId>org.glassfish.jersey.core</groupId>
			<artifactId>jersey-common</artifactId>
			<version>${jersey.common.version}</version>
			<exclusions>
				<exclusion>
					<groupId>jakarta.annotation</groupId>
					<artifactId>jakarta.annotation-api</artifactId>
				</exclusion>

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import junit.framework.TestCase;

/**
 * Tests for {@link Multisets}.
 *
 * @author Mike Bostock
 * @author Jared Levy
 * @author Louis Wasserman
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class MultisetsTest extends TestCase {

  /* See MultisetsImmutableEntryTest for immutableEntry() tests. */

import java.util.Set;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Implementation of {@link Multimaps#filterEntries(Multimap, Predicate)}.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
class FilteredEntryMultimap<K extends @Nullable Object, V extends @Nullable Object>

import java.util.Set;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Implementation of {@link Multimaps#filterEntries(Multimap, Predicate)}.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
class FilteredEntryMultimap<K extends @Nullable Object, V extends @Nullable Object>

 * element when the multiset was created.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible(serializable = true, emulated = true)
@SuppressWarnings("serial") // we're overriding default serialization
@ElementTypesAreNonnullByDefault