      var longest = 0
        var quanta = track.analysis[type];
        for (var i = 0; i < quanta.length; i++) {
            var q = quanta[i];
            for (var j = 0; j < q.neighbors.length; j++) {
                var neighbor = q.neighbors[j];
                var which = neighbor.dest.which;
                var delta = i - which;
                if (delta > longest) {
                    longest = delta;
                }
            }
        }
        var lbb = longest * 100 / quanta.length;
     