@SuppressWarnings("UnusedTypeParameter") // It's used reflectively.
  static final class NativeTypeVariableEquals<X> {
    static final boolean NATIVE_TYPE_VARIABLE_ONLY =
        !NativeTypeVariableEquals.class.getTypeParameters()[0].equals(
            newArtificialTypeVariable(NativeTypeVariableEquals.class, "X"));

    private NativeTypeVariableEquals() {}
  }

  private Types() {}

  @SuppressWarnings("UnusedTypeParameter") // It's used reflectively.
  static final class NativeTypeVariableEquals<X> {
    static final boolean NATIVE_TYPE_VARIABLE_ONLY =
        !NativeTypeVariableEquals.class.getTypeParameters()[0].equals(
            newArtificialTypeVariable(NativeTypeVariableEquals.class, "X"));

    private NativeTypeVariableEquals() {}
  }

  private Types() {}

         * by us. And that equality is guaranteed to hold because it doesn't involve the JDK
         * TypeVariable implementation at all.
         */
        if (Types.NativeTypeVariableEquals.NATIVE_TYPE_VARIABLE_ONLY
            && Arrays.equals(bounds, resolvedBounds)) {
          return var;
        }
        return Types.newArtificialTypeVariable(

         * by us. And that equality is guaranteed to hold because it doesn't involve the JDK
         * TypeVariable implementation at all.
         */
        if (Types.NativeTypeVariableEquals.NATIVE_TYPE_VARIABLE_ONLY
            && Arrays.equals(bounds, resolvedBounds)) {
          return var;
        }
        return Types.newArtificialTypeVariable(