}
        }

        @Override
        public boolean removeRule(Rule rule) {
            return rules.remove(rule);
        }

        @Override
        public boolean hasRule(Rule rule) {
            return rules.contains(rule);
        }

        public List<Rule> getRules() {
            return new ArrayList<>(rules);
        }

        public void clearRules() {

    /**
     * Checks if the specified rule exists.
     *
     * @param rule the rule to check for existence
     * @return true if the rule exists, false otherwise
     */
    boolean hasRule(Rule rule);

        public void addRule(int index, Rule rule) {
        }

        @Override
        public boolean removeRule(Rule rule) {
            return false;
        }

        @Override
        public boolean hasRule(Rule rule) {
            return false;
        }
    }

    /**
     * Test implementation of IntervalController for testing
     */