allows syncing two copies of data (all or just a part of it) from one DataCollection to another
| source | object | the object that the method is assigned to |
| filter | function | the filtering function |
| silent | boolean | if you set the parameter to `true`, the object won't be repainted after synchronization |
// full copy
$$("list").data.sync(data);
// partial copy
$$("dview").data.sync(data, function(){
this.filter(function(data) {
return data.year > 1994;
});
});