Bug 185898 ReportItemHandle needs to add two method: getAvailableDataBindingReferenceList and getDataBindingType.
ReportItemHandle needs to add two method: getAvailableDataBindingReferenceList and getDataBindingType. The first method provider the available ReportItem list of DataBindingReference. The second method provider the type of the DataBinding.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/ReportItemHandleTest.java
assertNotNull( element );
		innerHandle = new InnerReportItemHandle( design, element );
		DesignElementHandle itemHandle = innerHandle.getDataSet( );
		assertNotNull( itemHandle );
		String name = innerHandle.getDataSet( ).getElement( ).getName( );
		assertEquals( "myDataSet", name ); 
		
		element = design.findElement( "my list" ); 
		assertNotNull( element );
		innerHandle = new InnerReportItemHandle( design, element );
		itemHandle = innerHandle.getDataSet( );
		assertNotNull( itemHandle );
		DataSetHandle handle = designHandle.findDataSet( "myDataSet" ); 
		ListHandle list = (ListHandle) element.getHandle( design );
		list.setDataSet( handle );
		assertEquals( handle, list.getDataSet( ) );
		list.setDataSet( (DataSetHandle) null );
		assertNull( list.getDataSet( ) );
	}
	/**
	 * Tests 'addTOC' , 'getTOC' , 'setExpression' , 'getExpression' method.
	 * 
	 * @throws Exception
	 */
	public void testTOC( ) throws Exception
	{
		openDesign( "ReportItemHandleTest.xml" );  
		LabelHandle labelHandle = (LabelHandle) designHandle
				.findElement( "bodyLabel" );
		TOC toc = StructureFactory.createTOC( "toc" );