Bug 120317 Set "dimension" property to 3D in "properties" view, error appears in layout editor.
Description: Set "dimension" property to 3D in "properties" view, error appears in layout editor. Steps to reproduce: 1. Add a 2D chart in property editor. 2. Set its dimension property to "three-dimension" in properties view. 3. Error appears in chart.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/extension/PeerExtensibilityProvider.java
{
					if ( propName.equalsIgnoreCase( extProps[i].getName( ) ) )
					{
						return new ExtensionModelPropertyDefn( extProps[i],
								extDefn.getReportItemFactory( ).getMessages( ) );
					}
				}
			}
		}
		return propDefn;
	}
	/**
	 * Gets all the extension model properties defined by
	 * <code>IReportItem</code>.
	 * 
	 * @return the extension model properties, null if extended element is null
	 */
	private IPropertyDefinition[] getExtensionModelPropertyDefns( )
	{
		if ( reportItem == null )
			return null;
		return reportItem.getPropertyDefinitions( );
	}
	/**
	 * Gets the list of style masks for Model style properties.
	 * 
	 * @return the list of the style masks
	 */
	protected List getStyleMasks( )
	{