default R contains(CharSequence other) {
    Objects.requireNonNull(other, "other");
    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(StringOperators.CONTAINS, e, Expressions.constant(other.toString())));
  }
Check that attribute contains {@code other}
criteria/common/src/org/immutables/criteria/matcher/StringMatcher.java