Bug 164070 Support widows/orphans properties on text item
Support widows/orphans properties on block text item(label, text, data etc), About the definition of widows/orphans, please refer to CSS spec.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/DesignElementHandleTest.java
* 
	 * @throws SemanticException
	 */
	public void testClearElements( ) throws SemanticException
	{
		GraphicMasterPageHandle pageHandle = (GraphicMasterPageHandle) designHandle
				.findMasterPage( "My Page" ); 
		assertEquals( 4, pageHandle.getSlot( GraphicMasterPage.CONTENT_SLOT )
				.getCount( ) );
		pageHandle.clearContents( GraphicMasterPage.CONTENT_SLOT );
		assertEquals( 0, pageHandle.getSlot( GraphicMasterPage.CONTENT_SLOT )
				.getCount( ) );
	}
	/**
	 * Clear all properties of masterpage.
	 * 
	 * @throws SemanticException
	 */
	public void testClearProperties( ) throws SemanticException
	{
		GraphicMasterPageHandle pageHandle = (GraphicMasterPageHandle) designHandle
				.findMasterPage( "My Page" ); 
		pageHandle.clearAllProperties( );
	}
	/**
	 * Test the follwing addElementMethod.
	 * <ul>
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#addElement(DesignElementHandle, int) }
	 * </li>