@Override
    public Builder toBuilder() {
        return builder()
                .sourceLocation(getSourceLocation())
                .parameters(parameters)
                .rules(rules)
                .version(version);
    }
Gets the version of this rule-set.

@return the rule-set version.
smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/EndpointRuleSet.java