Function id

docs/app/js/sanddance-app.js:149511–149513

()

        };
    },
    id () {
        return (this._subid ? this._subid + ":" : 0) + this._id++;
    },
    add (op) {
        this.operators.push(op);
        op.id = this.id(); // if pre-registration references exist, resolve them now