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      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

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      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

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      on behalf of whom a Contribution has been received by Licensor and
      subsequently incorporated within the Work.

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      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

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      on behalf of whom a Contribution has been received by Licensor and
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    assertTrue(len4.matches('d'));
    for (char c = 'e'; c < 'z'; c++) {
      assertFalse(len4.matches(c));
    }

    Random rand = new Random(1234);
    for (int testCase = 0; testCase < 100; testCase++) {
      char[] chars = randomChars(rand, rand.nextInt(63) + 1);
      CharMatcher m = SmallCharMatcher.from(bitSet(chars), new String(chars));
      checkExactMatches(m, chars);
    }
  }