function range(lo, hi, renderCallback) {
        return intervalTree.search(lo, hi, function (index, top) {
          return renderCallback(index, items[index].left, top)
        })
      }
// Render all cells visible within the viewport range defined.
Render all cells visible within the viewport range defined.
Render all cells visible within the viewport range defined .
function range(lo, hi, renderCallback) {
        return intervalTree.search(lo, hi, function (index, top) {
          return renderCallback(index, items[index].left, top)
        })
      }
function range ( lo , hi , renderCallback ) { return intervalTree . search ( lo , hi , function ( index , top ) { return renderCallback ( index , items [ index ] . left , top ) } ) }
Render all cells visible within the viewport range defined.
Render all cells visible within the viewport range defined .