Bug 210716 Support switch Text/Chart view in crosstab cell
Need crosstab UI provide support to switch between Text and Chart view in measure/aggregation cell.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/internal/CrosstabModelUtil.java
return COLUMN_AXIS_TYPE;
			default :
				return NO_AXIS_TYPE;
		}
	}
	/**
	 * TODO this method should provide by DTE?
	 */
	public static String getRollUpAggregationFunction( String functionName )
	{
		if ( DesignChoiceConstants.AGGREGATION_FUNCTION_AVERAGE.equals( functionName )
				|| DesignChoiceConstants.AGGREGATION_FUNCTION_COUNT.equals( functionName )
				|| DesignChoiceConstants.AGGREGATION_FUNCTION_COUNTDISTINCT.equals( functionName ) )
		{
			return DesignChoiceConstants.AGGREGATION_FUNCTION_SUM;
		}
		else
		{
			return functionName;
		}
	}
	/**
	 * Gets the index where this level resides in the whole crosstab.
	 * 
	 * @param levelView
	 * @return
	 */
	static int getTotalIndex( LevelViewHandle levelView )
	{
		if ( levelView == null )