For read operations: the original category level from the provider. For write operations: fallback value used when value is omitted or "unmapped_value". You must ensure this matches the provider's format.
CategoryLevelSourceValueUnion.CreateStr(/* values here */);CategoryLevelSourceValueUnion.CreateNumber(/* values here */);CategoryLevelSourceValueUnion.CreateBoolean(/* values here */);CategoryLevelSourceValueUnion.CreateCategorySourceValueLevel(/* values here */);CategoryLevelSourceValueUnion.CreateArrayOfAny(/* values here */);