/**
 * Utilities for working with {@link Type}.
 *
 * @author Ben Yu
 */
final class Types {

  /** Class#toString without the "class " and "interface " prefixes */
  private static final Joiner COMMA_JOINER = Joiner.on(", ").useForNull("null");

  /** Returns the array type of {@code componentType}. */
  static Type newArrayType(Type componentType) {
    if (componentType instanceof WildcardType) {

/**
 * Utilities for working with {@link Type}.
 *
 * @author Ben Yu
 */
final class Types {

  /** Class#toString without the "class " and "interface " prefixes */
  private static final Joiner COMMA_JOINER = Joiner.on(", ").useForNull("null");

  /** Returns the array type of {@code componentType}. */
  static Type newArrayType(Type componentType) {
    if (componentType instanceof WildcardType) {

    }

    TypeVariable<?> captureAsTypeVariable(Type[] upperBounds) {
      String name =
          "capture#" + id.incrementAndGet() + "-of ? extends " + Joiner.on('&').join(upperBounds);
      return Types.newArtificialTypeVariable(WildcardCapturer.class, name, upperBounds);
    }

    private WildcardCapturer forTypeVariable(TypeVariable<?> typeParam) {

    }

    TypeVariable<?> captureAsTypeVariable(Type[] upperBounds) {
      String name =
          "capture#" + id.incrementAndGet() + "-of ? extends " + Joiner.on('&').join(upperBounds);
      return Types.newArtificialTypeVariable(WildcardCapturer.class, name, upperBounds);
    }

    private WildcardCapturer forTypeVariable(TypeVariable<?> typeParam) {