Bug 188829 Move the item ,the trans of the model don't close.
1:New report design. 2:Add a Embedded image. 3:Add another imge , then drag the second imge to the first position. 4:Change the size of the first image. Expected: Image change the size. Now: Image size don't change.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/command/ContentCommandTest.java
styleHandle.drop( );
		assertEquals( null, labelHandle.getStyle( ) );
		assertEquals( styleHandle.getName( ), labelHandle
				.getStringProperty( LabelHandle.STYLE_PROP ) );
		iter = styleHandle.clientsIterator( );
		assertEquals( false, iter.hasNext( ) );
		designHandle.getCommandStack( ).undo( );
		assertEquals( styleHandle.getName( ), labelHandle
				.getStringProperty( LabelHandle.STYLE_PROP ) );
		assertEquals( styleHandle, labelHandle.getStyle( ) );
		iter = styleHandle.clientsIterator( );
		assertEquals( true, iter.hasNext( ) );
	}
	private void createStyleAndLabel( ) throws Exception
	{
		designHandle = createDesign( );
		SharedStyleHandle styleHandle = designHandle.getElementFactory( )
				.newStyle( "style" );
		LabelHandle labelHandle = designHandle.getElementFactory( ).newLabel(
				"label" );
		designHandle.getStyles( ).add( styleHandle );
		designHandle.getBody( ).add( labelHandle );
		labelHandle.setStyle( styleHandle );
	}
	/**
	 * This test case is used to test that after remove a container from a
	 * container, whether the references on the removed container were adjusted
	 * correctly.
	 * 
	 * Test case: