UiGridCellNav = function UiGridCellNav(rowContainer, colContainer, leftColContainer, rightColContainer) {
        this.rows = rowContainer.visibleRowCache;
        this.columns = colContainer.visibleColumnCache;
        this.leftColumns = leftColContainer ? leftColContainer.visibleColumnCache : [];
        this.rightColumns = rightColContainer ? rightColContainer.visibleColumnCache : [];
        this.bodyContainer = rowContainer;
      }
@ngdoc object
 @name ui.grid.cellNav.object:CellNav
 @description returns a CellNav prototype function
 @param {object} rowContainer container for rows
 @param {object} colContainer parent column container
 @param {object} leftColContainer column container to the left of parent
 @param {object} rightColContainer column container to the right of parent