code: public static Predicate<CharSequence> contains(Pattern pattern) {
  		return t -> pattern.matcher(t).find();
  	}
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