code: function(options){
        var name = options.name
          , model = options.model
          , implementation = options.implementation
          , cid = options.cid;
  
        // save the new things by internal cid
        this._names[cid] = name;
        this._models[cid] = model;
        this._implementations[cid] = implementation;
  
        this._updateLength();
  
        return this;
      }
docs: Add an element to this container. Stores the element by `cid` and makes it searchable by the model cid (and model itself).