def by_outlook_category_id(self,outlook_category_id: str) -> OutlookCategoryItemRequestBuilder:
        """
        Provides operations to manage the masterCategories property of the microsoft.graph.outlookUser entity.
        param outlook_category_id: The unique identifier of outlookCategory
        Returns: OutlookCategoryItemRequestBuilder
        """
        if outlook_category_id is None:
            raise TypeError("outlook_category_id cannot be null.")
        from .item.outlook_category_item_request_builder import OutlookCategoryItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["outlookCategory%2Did"] = outlook_category_id
        return OutlookCategoryItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the masterCategories property of the microsoft.graph.outlookUser entity.
        param outlook_category_id: The unique identifier of outlookCategory
        Returns: OutlookCategoryItemRequestBuilder
        
msgraph/generated/users/item/outlook/master_categories/master_categories_request_builder.py