*/
    public static Class<?> getElementTypeOfCollection(final Field field) {
        assertArgumentNotNull("field", field);

        final Type type = field.getGenericType();
        return GenericsUtil.getRawClass(GenericsUtil.getElementTypeOfCollection(type));
    }

    /**
     * パラメタ化されたマップ型のフィールドのキー型を返します。
     *
     * @param field
     *            パラメタ化されたマップ型のフィールド。{@literal null}であってはいけません

    }
  }

  private static String getTypesString(List<? extends Type> types) {
    List<String> names = transform(types, SIMPLE_NAME_GETTER);
    return Joiner.on(", ").join(names);
  }

  private static final Function<Type, String> SIMPLE_NAME_GETTER =
      new Function<Type, String>() {
        @Override
        public String apply(Type from) {
          if (from instanceof Class) {

    }
  }

  private static String getTypesString(List<? extends Type> types) {
    List<String> names = transform(types, SIMPLE_NAME_GETTER);
    return Joiner.on(", ").join(names);
  }

  private static final Function<Type, String> SIMPLE_NAME_GETTER =
      new Function<Type, String>() {
        @Override
        public String apply(Type from) {
          if (from instanceof Class) {

  /*
   * This class is used to serialize all ImmutableSortedSet instances,
   * regardless of implementation type. It captures their "logical contents"
   * only. This is necessary to ensure that the existence of a particular
   * implementation type is an implementation detail.
   */
  @J2ktIncompatible // serialization
  private static class SerializedForm<E> implements Serializable {

  }

  Type[] resolveTypesInPlace(Type[] types) {
    for (int i = 0; i < types.length; i++) {
      types[i] = resolveType(types[i]);
    }
    return types;
  }

  private Type[] resolveTypes(Type[] types) {
    Type[] result = new Type[types.length];
    for (int i = 0; i < types.length; i++) {
      result[i] = resolveType(types[i]);
    }
    return result;
  }

      Class<? super @NonNull E> type, E[] emptyArrayForContents, Iterable<? extends E> contents) {
    List<E> setContents = new ArrayList<>();
    for (E e : contents) {
      if (!setContents.contains(e)) {
        setContents.add(e);
      }
    }
    return new MinimalSet<>(type, setContents.toArray(emptyArrayForContents));
  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {

      Class<? super @NonNull E> type, E[] emptyArrayForContents, Iterable<? extends E> contents) {
    List<E> setContents = new ArrayList<>();
    for (E e : contents) {
      if (!setContents.contains(e)) {
        setContents.add(e);
      }
    }
    return new MinimalSet<>(type, setContents.toArray(emptyArrayForContents));
  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {

import org.apache.maven.execution.ExecutionEvent.Type;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.ExecutionEventCatapult;
import org.apache.maven.plugin.MojoExecution;

/**
 */
public class ExecutionEventCatapultStub implements ExecutionEventCatapult {

    public void fire(Type eventType, MavenSession session, MojoExecution mojoExecution) {}

   */
  public <N1 extends N> ValueGraphBuilder<N1, V> incidentEdgeOrder(
      ElementOrder<N1> incidentEdgeOrder) {
    checkArgument(
        incidentEdgeOrder.type() == ElementOrder.Type.UNORDERED
            || incidentEdgeOrder.type() == ElementOrder.Type.STABLE,
        "The given elementOrder (%s) is unsupported. incidentEdgeOrder() only supports"
            + " ElementOrder.unordered() and ElementOrder.stable().",

 * "undo" it as best we can.
 */
@GwtCompatible
@Retention(RUNTIME)
@Target(TYPE)
@TypeQualifierDefault({FIELD, METHOD, PARAMETER})
@Nonnull