How to remove a Category from Import wizard in Eclipse-RCP?

Question

I need to add an import wizard into my eclipse-rcp app. For that I would like to use existing wizard with only my categories. I found couple of examples in the Internet, but

Answer 1

The problem with the solution you point out is that it is using the NewWizardRegistry to retrieve the categories of the wizards. Instead, if you want to remove the import wizards you should poll the Workbench for the ImportWizardRegistry:

AbstractExtensionWizardRegistry importWizardRegistry = (AbstractExtensionWizardRegistry) PlatformUI.getWorkbench().getImportWizardRegistry();

Everything else is OK.