Bug 153040 Template definition should be removed after the report item is deleted
Steps to reproduce: 1.New a report, extends lib.label 2.Convert the label to template report item, and revert it back to the report item 3.Delete the label 4.Remove the included library Expected result: Library can be removed Actual result: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:2.1.0.v20060808-0630 Error Code:Error.LibraryException.LIBRARY_HAS_DESCENDENTS Error Message:The library "Lib" can no be dropped because it has descendents "NewLabel" in the current module.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ExtensionModelPropertyDefn.java
{
		return getChoices( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.metadata.PropertyDefn#getChoices()
	 */
	public IChoiceSet getChoices( )
	{
		Collection choices = extProperty.getChoices( );
		if ( choices == null )
			return null;
		if ( choices.size( ) == 0 )
			return null;
		Choice[] choiceArray = new Choice[choices.size( )];
		Iterator iter = choices.iterator( );
		int i = 0;
		while ( iter.hasNext( ) )
		{
			IChoiceDefinition choice = (IChoiceDefinition) iter.next( );
			ExtensionChoice extChoice = new ExtensionChoice( choice, messages );
			choiceArray[i] = extChoice;
			i++;
		}
		assert i == choices.size( );
		ChoiceSet set = new ChoiceSet( );
		set.setChoices( choiceArray );
		details = set;
		return set;