.build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .code(421)
        .body("misdirected!")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .body("after misdirect")
        .build(),
    )

    // Seed the connection pool.
    assert200Http2Response(execute(url), server.hostName)

/** `307 Temporary Redirect` (HTTP/1.1 - RFC 7231)  */
const val HTTP_TEMP_REDIRECT = 307

/** `308 Permanent Redirect` (HTTP/1.1 - RFC 7538)  */
const val HTTP_PERM_REDIRECT = 308

/** `421 Misdirected Request` (HTTP/2 - RFC 7540)  */

License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual...

import java.util.Set;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * A series of tests that support asserting that collections cannot be modified, either through
 * direct or indirect means.
 *
 * @author Robert Konigsberg
 */
@GwtCompatible
@NullMarked
public class UnmodifiableCollectionTests {

  public static void assertMapEntryIsUnmodifiable(Entry<?, ?> entry) {
    try {

    ensureNotDirectlyModifiable(unmod.tailSet(2, true));
    ensureNotDirectlyModifiable(unmod.subSet(1, 3));
    ensureNotDirectlyModifiable(unmod.subSet(1, true, 3, true));

    /* UnsupportedOperationException on indirect modifications. */
    NavigableSet<Integer> reverse = unmod.descendingSet();
    assertThrows(UnsupportedOperationException.class, () -> reverse.add(4));