return new ModifyParametersWizard((ModifyParametersRefactoring)ref, title, helpId);
return new ModifyParametersWizard(fRefactoring, title, helpId);
	protected RefactoringWizard createWizard(Refactoring ref){		String title= RefactoringMessages.getString("RefactoringGroup.modify_method_parameters"); //$NON-NLS-1$		//FIX ME: wrong		String helpId= IJavaHelpContextIds.RENAME_PARAMS_ERROR_WIZARD_PAGE;		return new ModifyParametersWizard((ModifyParametersRefactoring)ref, title, helpId);	}