assertNodeRemovedFromGraphErrorMessage(
        assertThrows(IllegalStateException.class, n1AdjacentNodes::size));
    assertNodeRemovedFromGraphErrorMessage(
        assertThrows(IllegalStateException.class, n1Predecessors::size));
    assertNodeRemovedFromGraphErrorMessage(
        assertThrows(IllegalStateException.class, n1Successors::size));
    assertNodeRemovedFromGraphErrorMessage(

  public void start() throws Exception {
    if (mockWebServer != null) throw new IllegalStateException();

    mockWebServer = new MockWebServer();
    mockWebServer.setDispatcher(this);
    mockWebServer.start(slackApi.port);
  }

  public HttpUrl newAuthorizeUrl(String scopes, String team, Listener listener) {
    if (mockWebServer == null) throw new IllegalStateException();

    ByteString state = randomToken();
    synchronized (this) {

    }

    @Override
    Comparable<?> endpoint() {
      throw new IllegalStateException("range unbounded on this side");
    }

    @Override
    boolean isLessThan(Comparable<?> value) {
      return true;
    }

    @Override
    BoundType typeAsLowerBound() {
      throw new IllegalStateException();
    }

    @Override
    BoundType typeAsUpperBound() {

      try {
        input.readFully(b);
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public void readFully(byte[] b, int off, int len) {
      try {
        input.readFully(b, off, len);
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public int skipBytes(int n) {
      try {

            ipad[i] = IPAD;
            opad[i] = OPAD;
        }
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (final Exception ex) {
            throw new IllegalStateException(ex.getMessage());
        }
        engineReset();
    }

    private HMACT64(final HMACT64 hmac) throws CloneNotSupportedException {
        super("HMACT64");
        this.ipad = hmac.ipad;

        .addNetworkInterceptor(interceptor)
        .build()
    val request =
      Request
        .Builder()
        .url(server.url("/"))
        .build()
    assertFailsWith<IllegalStateException> {
      client.newCall(request).execute()
    }.also { expected ->
      assertThat(expected.message).isEqualTo(
        "network interceptor $interceptor must call proceed() exactly once",
      )
    }

    assertThrows(IllegalStateException.class, () -> hasher.putInt(42));
  }

  public void testHashTwice() {
    Hasher hasher = Hashing.hmacMd5(MD5_KEY).newHasher();

    assertEquals(
        "9753980fe94daa8ecaa82216519393a9",
        hasher.putString("The quick brown fox jumps over the lazy dog", UTF_8).hash().toString());
    assertThrows(IllegalStateException.class, () -> hasher.hash());
  }

    assertThrows(IllegalStateException.class, () -> sha1.putInt(42));
  }

  public void testHashTwice() {
    Hasher sha1 = Hashing.sha1().newHasher();

    assertEquals(
        "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12",
        sha1.putString("The quick brown fox jumps over the lazy dog", UTF_8).hash().toString());
    assertThrows(IllegalStateException.class, () -> sha1.hash());
  }

   * high wastes memory.
   *
   * @return this {@code CacheBuilder} instance (for chaining)
   * @throws IllegalArgumentException if {@code initialCapacity} is negative
   * @throws IllegalStateException if an initial capacity was already set
   */
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> initialCapacity(int initialCapacity) {
    checkState(
        this.initialCapacity == UNSET_INT,

import com.google.common.base.Supplier;
import com.google.common.collect.ForwardingSet;
import java.util.Set;

/**
 * A subclass of `ForwardingSet` that throws `IllegalStateException` on invocation of any method
 * (except `hashCode` and `equals`) if the provided `Supplier` returns false.
 */
final class InvalidatableSet<E> extends ForwardingSet<E> {
  private final Supplier<Boolean> validator;