in src/main/java/com/googlesource/gerrit/plugins/auditsl4j/AuditRendererToCsv.java [102:124]
  private Object getFormattedAuditList(Multimap<String, ?> params) {
    if (params == null || params.size() == 0) {
      return "[]";
    }
    StringBuilder formattedOut = new StringBuilder("[");
    Set<String> paramNames = new TreeSet<>(params.keySet());
    int numParams = 0;
    for (String paramName : paramNames) {
      if (numParams++ > 0) {
        formattedOut.append(",");
      }
      formattedOut.append(paramName);
      formattedOut.append("=");
      formattedOut.append(getFormattedAudit(params.get(paramName)));
    }
    formattedOut.append(']');
    return formattedOut.toString();
  }