Bug 148761 Unable to copy a report item from template to report
Steps: 1. Create a template, add a Text item "t1" or others 2. Create template item using "t1" 3. Double click the template item and we get a report item again. 4. We copy the item, paste to another report file. Expected: the text item can be copied. Actual result: Nothing happened, not copied and no error msg.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/validators/MasterPageContextContainmentValidator.java
*/
	private List doValidate( Module module, DesignElement toValidate,
			boolean isAddListing )
	{
		DesignElement container = toValidate;
		MasterPage page = null;
		while ( container != null )
		{
			if ( container instanceof MasterPage )
			{
				page = (MasterPage) container;
				break;
			}
			container = container.getContainer( );
		}
		if ( page == null )
			return Collections.EMPTY_LIST;
		List list = new ArrayList( );
		if ( ModelUtil
				.containElement( page, ReportDesignConstants.LISTING_ITEM )
				|| isAddListing )
		{
			list
					.add( new SemanticError(
							toValidate,
							SemanticError.DESIGN_EXCEPTION_INVALID_MASTER_PAGE_CONTEXT_CONTAINMENT ) );
		}
		return list;
	}
	/**