     //  selectionLength
     //----------------------------------
        
-    // 
     /**
      *  @private
      *  Cache the selectionLength.  Only recalculate if selectionLength is -1.

{
import flash.geom.Rectangle;

import mx.collections.IList;
import mx.core.mx_internal;
import mx.events.CollectionEvent;
import mx.events.CollectionEventKind;
import mx.collections.ICollectionView;

import spark.components.Grid;
import spark.components.gridClasses.CellPosition;

use namespace mx_internal;
  

/**
 *  <p>Track a Grid's selectionMode and its set of selected rows, columns, or cells.   
 *  The selected elements are defined by integer indices, where row indices are 

    {
        return contains(cellColumnIndex, cellRowIndex);
    }
}