text: function Vehicle() { };
  
  Vehicle.prototype.brake = function () { };
  
  function Bus() { };
  Bus.prototype = new Vehicle();
  
  Object.defineProperty(Bus.prototype, "constructor", {
      enumerable: false,
      value: Bus,
      writable: true
  });
  
  module.exports = {
      prototypes: { Bus, Vehicle }
  };
  