builder:RulesProperties: initialise rules list
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@ -30,6 +30,7 @@ import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.context.properties.ConfigurationProperties;
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import org.springframework.context.annotation.Configuration;
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import java.util.ArrayList;
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import java.util.List;
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/**
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@ -47,5 +48,5 @@ class RulesProperties {
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/**
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* The Checkstyle checks.
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*/
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private List<Rule> rules;
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private List<Rule> rules = new ArrayList<>();
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}
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