Bug 184762 BIRT Model - Enhancments to the level defintion
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/LevelViewHandle.java
* @throws SemanticException
	 */
	public void setAggregationHeaderLocation( String value )
			throws SemanticException
	{
		handle.setStringProperty( AGGREGATION_HEADER_LOCATION_PROP, value );
	}
	/**
	 * Gets the member property handle of this level view.
	 * 
	 * @return the member property handle
	 */
	public PropertyHandle getMemberProperty( )
	{
		return handle.getPropertyHandle( MEMBER_PROP );
	}
	/**
	 * Gets the aggregation header property handle of this level view.
	 * 
	 * @return the aggregation header property handle
	 */
	public PropertyHandle getAggregationHeaderProperty( )
	{
		return handle.getPropertyHandle( AGGREGATION_HEADER_PROP );
	}
	/**
	 * Gets the detail cell of this level view.
	 * 
	 * @return the detail cell of this level view if set, otherwise null
	 */