Bug 188027 PasteAction is diabled
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/ReportDesignHandleTest.java
assertFalse( designHandle.needsSave( ) );
		grid = factory.newGridItem( "new second grid" ); 
		slot.add( grid );
		assertTrue( designHandle.needsSave( ) );
		slot.dropAndClear( grid );
		assertTrue( designHandle.needsSave( ) );
		ActivityStack as = design.getActivityStack( );
		as.undo( );
		assertTrue( designHandle.needsSave( ) );
		as.undo( );
		assertFalse( designHandle.needsSave( ) );
		as.undo( );
		assertFalse( as.canUndo( ) );
		assertTrue( designHandle.needsSave( ) );
	}
	/**
	 * Execute an command and undo it, the state should be clean.
	 * 
	 * @throws Exception
	 */
	public void testNeedsSave2( ) throws Exception
	{
		save( designHandle );
		ElementFactory factory = new ElementFactory( design );
		LabelHandle label = factory.newLabel( "Label1" ); 
		SlotHandle slotHandle = designHandle.getBody( );
		slotHandle.add( label );
		assertTrue( designHandle.needsSave( ) );
		design.getActivityStack( ).undo( );
		assertFalse( designHandle.needsSave( ) );