def _set_instance_tag_cache(self, instance, tags):
        setattr(instance, '_%s_cache' % self.attname, tags)
L{Platform.isWinNT} is deprecated in favor of L{platform.isWindows}.
dataset/ETHPy150Open amarandon/smeuhsocial/apps/tagging/fields.py/TagField._set_instance_tag_cache--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/python/test/test_runtime.py/PlatformTests.test_isWinNTDeprecated