code: function(parser, reporter) {
          "use strict";
          var rule = this;
  
          // check if property name starts with "*"
          parser.addListener("property", function(event) {
              var property = event.property;
  
              if (property.hack === "*") {
                  reporter.report("Property with star prefix found.", event.property.line, event.property.col, rule);
              }
          });
      }
docs: initialization