* involving any parameters to the calling method.
   *
   * @param expression a boolean expression
   * @throws IllegalStateException if {@code expression} is false
   * @see Verify#verify Verify.verify()
   */
  public static void checkState(boolean expression) {
    if (!expression) {
      throw new IllegalStateException();
    }
  }

  /**

   * 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,

          executor);
      fail();
    } catch (IllegalStateException expected2) {
    }
    try {
      ClosingFuture.whenAllComplete(asList(closingFuture));
      fail();
    } catch (IllegalStateException expected1) {
    }
    try {
      ClosingFuture.whenAllSucceed(asList(closingFuture));
      fail();
    } catch (IllegalStateException expected) {
    }
  }

    assertFailsWith<IllegalStateException> {
      setString(0, "A")
    }
    assertFailsWith<IllegalStateException> {
      newSource(0)
    }
    assertFailsWith<IllegalStateException> {
      newSink(0)
    }
    assertFailsWith<IllegalStateException> {
      commit()
    }
    assertFailsWith<IllegalStateException> {
      abort()
    }
  }

    assertTrue(cycle.hasNext());
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleRemoveSameElementTwice() {
    Iterator<String> cycle = Iterators.cycle("a", "b");
    cycle.next();
    cycle.remove();
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleWhenRemoveIsNotSupported() {

    assertTrue(cycle.hasNext());
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleRemoveSameElementTwice() {
    Iterator<String> cycle = Iterators.cycle("a", "b");
    cycle.next();
    cycle.remove();
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleWhenRemoveIsNotSupported() {

  private val sslSocketFactoryOrNull: SSLSocketFactory?

  @get:JvmName("sslSocketFactory")
  val sslSocketFactory: SSLSocketFactory
    get() = sslSocketFactoryOrNull ?: throw IllegalStateException("CLEARTEXT-only client")

  @get:JvmName("x509TrustManager")
  val x509TrustManager: X509TrustManager?

  @get:JvmName("connectionSpecs")
  val connectionSpecs: List<ConnectionSpec> =

   * @throws IllegalStateException if the {@code Future} is not done
   * @since 20.0
   */
  @CanIgnoreReturnValue
  // TODO(cpovirk): Consider calling getDone() in our own code.
  @ParametricNullness
  public static <V extends @Nullable Object> V getDone(Future<V> future) throws ExecutionException {
    /*

  }

  @Test
  fun incompleteUrlComposition() {
    val noHost =
      assertFailsWith<IllegalStateException> {
        HttpUrl.Builder().scheme("http").build()
      }
    assertThat(noHost.message).isEqualTo("host == null")
    val noScheme =
      assertFailsWith<IllegalStateException> {
        HttpUrl.Builder().host("host").build()
      }

    }

    @Override
    public void remove() {
      checkRemove(false);
    }
  }

  /**
   * Returns the empty {@code Iterator} that throws {@link IllegalStateException} instead of {@link
   * UnsupportedOperationException} on a call to {@link Iterator#remove()}.
   */
  // Casting to any type is safe since there are no actual elements.
  @SuppressWarnings("unchecked")