Method rulesets

src/common/style/CartoCSS.js:4324–4332

()

    }

    rulesets() {
        if (this._rulesets) {
            return this._rulesets;
        } else {
            return this._rulesets = this.rules.filter(function (r) {
                return (r instanceof CartoCSS.Tree.Ruleset);
            });
        }
    }

    find(selector, self) {
        self = self || this;