Instanciating

var Base = {
  _ops: {},
  _privateFnc: function () {},
  abstract: function () {},
  init: function (ops) {
    this._ops = ops || {};
    // INIT
  }
};

var ThingBaseProps = {
    abstract: { 
        value: function() {
                   return this._ops;
               }
    }
};

var ThingBase = Object.create(Base, ThingBaseProps);

var Thing = function (ops) {
    var instance = Object.create(ThingBase);
    instance.init(ops);
    return instance;
};

var thingA = Thing(),
    thingB = Thing({foo:'bar'});