*            The type of the third value
 * @param <T4>
 *            The type of the fourth value
 */
public class Tuple4<T1, T2, T3, T4> {

    /** The first value */
    protected T1 value1;

    /** The second value */
    protected T2 value2;

    /** The third value */
    protected T3 value3;

    /** The fourth value */
    protected T4 value4;

    /**

     *            The fourth value
     * @param value5
     *            The fifth value
     * @return A tuple of five values
     */
    public static <T1, T2, T3, T4, T5> Tuple5<T1, T2, T3, T4, T5> tuple5(final T1 value1, final T2 value2, final T3 value3, final T4 value4,
            final T5 value5) {
        return new Tuple5<>(value1, value2, value3, value4, value5);
    }

    /**
     * Constructs an instance.
     */

<pre>
// invalid array types
type (
	T1 [10]T1                 // element type of T1 is T1
	T2 [10]struct{ f T2 }     // T2 contains T2 as component of a struct
	T3 [10]T4                 // T3 contains T3 as component of a struct in T4
	T4 struct{ f T3 }         // T4 contains T4 as component of array T3 in a struct
)

// valid array types
type (
	T5 [10]*T5                // T5 contains T5 as component of a pointer

    assertThat(actualSubtype.getActualTypeArguments()[0]).isInstanceOf(WildcardType.class);
  }

  public <T> void testGetSubtype_manyGenericArgs() {
    class FourTypeArgs<T1, T2, T3, T4> {}
    class ThreeTypeArgs<T1, T2, T3> extends FourTypeArgs<T1, T2, T3, String> {}
    TypeToken<FourTypeArgs<T, Integer, ?, ?>> supertype =
        new TypeToken<FourTypeArgs<T, Integer, ?, ?>>() {};

    assertThat(actualSubtype.getActualTypeArguments()[0]).isInstanceOf(WildcardType.class);
  }

  public <T> void testGetSubtype_manyGenericArgs() {
    class FourTypeArgs<T1, T2, T3, T4> {}
    class ThreeTypeArgs<T1, T2, T3> extends FourTypeArgs<T1, T2, T3, String> {}
    TypeToken<FourTypeArgs<T, Integer, ?, ?>> supertype =
        new TypeToken<FourTypeArgs<T, Integer, ?, ?>>() {};

	{"", []string{}},
	{" ", []string{}},
	{" \t ", []string{}},
	{"  abc  ", []string{"abc"}},
	{"1 2 3 4", []string{"1", "2", "3", "4"}},
	{"1  2  3  4", []string{"1", "2", "3", "4"}},
	{"1\t\t2\t\t3\t4", []string{"1", "2", "3", "4"}},
	{"1\u20002\u20013\u20024", []string{"1", "2", "3", "4"}},
	{"\u2000\u2001\u2002", []string{}},
	{"\n™\t™\n", []string{"™", "™"}},
	{faces, []string{faces}},
}