public Builder version(String version) {
            this.version = version;
            return this;
        }
Sets the version for the {@link EndpointRuleSet}.
If not set, the version will default to the latest version.

@param version The version to set
@return the {@link Builder}
smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/EndpointRuleSet.java