function PreviousMap(css, opts) {
        _classCallCheck(this, PreviousMap);

        this.loadAnnotation(css);
        /**
         * @member {boolean} - Was source map inlined by data-uri to input CSS.
         */
        this.inline = this.startWith(this.annotation, 'data:');

        var prev = opts.map ? opts.map.prev : undefined;
        var text = this.loadMap(opts.from, prev);
        if (text) this.text = text;
    }
@member {boolean} - Was source map inlined by data-uri to input CSS.