*
   * @throws IllegalArgumentException if the pattern is invalid
   * @since 3.0
   */
  @GwtIncompatible // Only used by other GWT-incompatible code.
  public static Predicate<CharSequence> containsPattern(String pattern) {
    return new ContainsPatternFromStringPredicate(pattern);
  }

  /**
   * Returns a predicate that evaluates to {@code true} if the {@code CharSequence} being tested

  /**
   * Tests for Predicates.contains(Pattern) and .containsPattern(String). We assume the regex level
   * works, so there are only trivial tests of that aspect. TODO: Fix comment style once annotation
   * stripper is fixed.
   */
  @GwtIncompatible // Predicates.containsPattern
  public void testContainsPattern_apply() {
    Predicate<CharSequence> isFoobar = Predicates.containsPattern("^Fo.*o.*bar$");