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
assertNotNull( slotHandle );
		assertEquals( slotHandle.getElement( ), designHandle
				.findMasterPage( "My Page" ) ); 
		assertEquals( GraphicMasterPage.CONTENT_SLOT, slotHandle.getSlotID( ) );
		eHandle = designHandle.findElement( "text2" ); 
		slotHandle = eHandle.getContainerSlotHandle( );
		assertTrue( slotHandle.getElement( ) instanceof Cell );
		slotHandle = designHandle.getContainerSlotHandle( );
		assertNull( slotHandle );
	}
	/**
	 * Tests the private style and shared style of an element. Following methods
	 * have been tested:
	 * <ul>
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#getStyle()}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#getPrivateStyle()}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#setStyle(SharedStyleHandle)}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#setStyleElement}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#setStyleName(String)}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#getName()}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#setName(String)}
	 * <li>
	 * {@link org.eclipse.birt.report.model.api.DesignElementHandle#getChoices(String)}