manager.addListener(listener, directExecutor());
    assertState(manager, Service.State.NEW, a, b, c, d, e);
    assertThrows(IllegalStateException.class, () -> manager.startAsync().awaitHealthy());
    assertFalse(listener.healthyCalled);
    assertState(manager, Service.State.RUNNING, a, c, e);
    assertEquals(ImmutableSet.of(b, d), listener.failedServices);
    assertState(manager, Service.State.FAILED, b, d);

import static org.codelibs.core.misc.AssertionUtil.assertArgumentNotEmpty;
import static org.codelibs.core.misc.AssertionUtil.assertArgumentNotNull;
import static org.codelibs.core.misc.AssertionUtil.assertState;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.sql.Time;

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.collection;

import static org.codelibs.core.misc.AssertionUtil.assertIndex;
import static org.codelibs.core.misc.AssertionUtil.assertState;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.reflect.Array;
import java.util.AbstractMap;
import java.util.AbstractSet;

     *            事前条件
     * @param description
     *            不正な状態であることの説明
     * @throws ClIllegalStateException
     *             {@code expression}がfalseの場合。
     */
    public static void assertState(final boolean expression, final String description) {
        if (!expression) {
            throw new ClIllegalStateException(description);
        }
    }

    /**
     * indexが不正でないことを表明します。
     *