s.tokEnd = s.tokPos
	}
	// s.tokEnd >= s.tokPos

	if s.tokBuf.Len() == 0 {
		// common case: the entire token text is still in srcBuf
		return string(s.srcBuf[s.tokPos:s.tokEnd])
	}

	// part of the token text was saved in tokBuf: save the rest in
	// tokBuf as well and return its content
	s.tokBuf.Write(s.srcBuf[s.tokPos:s.tokEnd])
	s.tokPos = s.tokEnd // ensure idempotency of TokenText() call

    TypeToken<First<String>> tokenF = new TypeToken<First<String>>() {};
    assertTrue(tokenF.isSupertypeOf(new TypeToken<Second<String>>() {}));
    assertTrue(tokenF.isSupertypeOf(new TypeToken<Third<String, Integer>>() {}));
    assertFalse(tokenF.isSupertypeOf(new TypeToken<Third<Integer, String>>() {}));
    assertTrue(tokenF.isSupertypeOf(new TypeToken<Fourth<Integer, String>>() {}));

    TypeToken<First<String>> tokenF = new TypeToken<First<String>>() {};
    assertTrue(tokenF.isSupertypeOf(new TypeToken<Second<String>>() {}));
    assertTrue(tokenF.isSupertypeOf(new TypeToken<Third<String, Integer>>() {}));
    assertFalse(tokenF.isSupertypeOf(new TypeToken<Third<Integer, String>>() {}));
    assertTrue(tokenF.isSupertypeOf(new TypeToken<Fourth<Integer, String>>() {}));