Bug 201858 Provide utility method for UI to check the proper aggregation type of xTab measure.
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/api/ICubeQueryUtil.java
* @param higherLevelDefns
	 * @param values
	 * @return
	 * @throws AdapterException
	 */
	public Iterator getMemberValueIterator( TabularCubeHandle cubeHandle,
			String targetLevel, ILevelDefinition[] higherLevelDefns,
			Object[] values ) throws AdapterException;
	
	/**
	 * 
	 * @param cubeHandle
	 * @param targetLevel
	 * @param higherLevelDefns
	 * @param values
	 * @param appContext
	 * @return
	 * @throws AdapterException
	 */
	public Iterator getMemberValueIterator( TabularCubeHandle cubeHandle,
			String targetLevel, ILevelDefinition[] higherLevelDefns,
			Object[] values, Map appContext ) throws AdapterException;
	
	/**
	 * Return member value of a given level.
	 * @param cubeHandle
	 * @param dataBindingExpr
	 * @param queryDefn
	 * @return
	 * @throws AdapterException