code: function adjustRange(w, bisect) {
    var r0 = w.i0,
        r1 = w.i1 - 1,
        c = w.compare,
        d = w.data,
        n = d.length - 1;
  
    if (r0 > 0 && !c(d[r0], d[r0-1])) w.i0 = bisect.left(d, d[r0]);
    if (r1 < n && !c(d[r1], d[r1+1])) w.i1 = bisect.right(d, d[r1]);
  }
docs: if frame type is 'range', adjust window for peer values