@classmethod<EOL><INDENT>def add_product_flag_on_category(<EOL>cls,<EOL>condition=conditions.FlagBase.ENABLE_IF_TRUE,<EOL>):<DEDENT>
flag = conditions.ProductFlag.objects.create(<EOL>description="<STR_LIT>",<EOL>condition=condition,<EOL>)<EOL>flag.categories.add(cls.CAT_1)<EOL>flag.enabling_products.add(cls.PROD_3)<EOL>
Adds a product flag condition that operates on a category:
        adding an item from CAT_1 is predicated on adding PROD_3 beforehand