@SuppressWarnings("unchecked")
  default R or(R other) {
    return Matchers.combine((R) this, other, Operators.OR);
  }
Combine {@code this} and {@code other} expression (criteria / matcher) using logical {@code OR}
operator. Equivalent to {@code this OR other}.

@param other other matcher
@return new root criteria with updated expression
criteria/common/src/org/immutables/criteria/matcher/OrMatcher.java