Bug 210609 [Smoke]Crosstab is failed to preview in runtime
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/extension/ExtensionPointManager.java
}
						}
					}
				}
			}
		}
		return providerFactoryMap;
	}
	private List getExtensionElements( String id )
	{
		IExtensionRegistry registry = Platform.getExtensionRegistry( );
		if ( registry == null )
		{
			return Collections.EMPTY_LIST;
		}
		IExtensionPoint extensionPoint = registry.getExtensionPoint( id );
		if ( extensionPoint == null )
		{
			return Collections.EMPTY_LIST;
		}
		return Arrays.asList( extensionPoint.getExtensions( ) );
	}
	private ExtendedElementUIPoint createReportItemUIPoint( IExtension extension )
	{
		IConfigurationElement[] elements = extension.getConfigurationElements( );
		if ( elements != null && elements.length > 0 )
		{
			return loadElements( elements );
		}
		return null;