get size(){return this.values_.size;}
serialize(serializer){const keys=[...this.values_.keys()];keys.sort();return[serializer.getOrAllocateId(this.colorScheme),serializer.getOrAllocateId(keys.map(k=>serializer.getOrAllocateId(k))),...keys.map(k=>this.get(k)),];}
asDictInto_(d){d.values={};for(const[name,value]of this){d.values[name]=tr.b.numberToJson(value);}