core/src/main/java/org/apache/servicecomb/core/governance/GovernanceConfiguration.java [62:71]:
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  public static String getStringProperty(String defaultValue, String... keys) {
    String property;
    for (String key : keys) {
      property = DynamicPropertyFactory.getInstance().getStringProperty(key, null).get();
      if (property != null) {
        return property;
      }
    }
    return defaultValue;
  }
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handlers/handler-loadbalance/src/main/java/org/apache/servicecomb/loadbalance/Configuration.java [195:204]:
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  public static String getStringProperty(String defaultValue, String... keys) {
    String property;
    for (String key : keys) {
      property = DynamicPropertyFactory.getInstance().getStringProperty(key, null).get();
      if (property != null) {
        return property;
      }
    }
    return defaultValue;
  }
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