const google.golang.org/protobuf/internal/genid.FeatureSet_VisibilityFeature_DEFAULT_SYMBOL_VISIBILITY_UNKNOWN_enum_value

one use

	google.golang.org/protobuf/internal/genid (current package)
		descriptor_gen.go#L1171: 	FeatureSet_VisibilityFeature_DEFAULT_SYMBOL_VISIBILITY_UNKNOWN_enum_value = 0