code: @GwtIncompatible(value = "java.util.regex.Pattern")
    public static Predicate<CharSequence> contains(Pattern pattern) {
      return new ContainsPatternPredicate(new JdkPattern(pattern));
    }
docs: Returns a predicate that evaluates to {@code true} if the {@code CharSequence} being tested
  contains any match for the given regular expression pattern. The test used is equivalent to
  {@code pattern.matcher(arg).find()}
  
  @since 3.0