DimensionDataStorage#computeIfAbsent takes in three arguments: a function to load NBT data into a SD and return it, a supplier to construct a new instance of the SD, and the name of the .dat file stored within the data folder for the implemented level.
On 1.20.2, it takes in 2 arguments instead. The first argument is a record instead of function. The record in which takes in default constructor for the Saved Data, NBT deserializer, and nullable DFU Type.
Matyrobbrt
commented
4 months ago
https://github.com/neoforged/Documentation/blame/main/docs/datastorage/saveddata.md#L21
On 1.20.2, it takes in 2 arguments instead. The first argument is a record instead of function. The record in which takes in default constructor for the Saved Data, NBT deserializer, and nullable DFU Type.