Yes, for FFI jextract can also auto-generate helper classes, so some C struct named tb_cell with a field named ch typed int, you could access its fields like tb

Yes, for FFI jextract can also auto-generate helper classes, so some C struct named tb_cell with a field named ch typed int, you could access its fields like tb_cell.ch$get(memorySegment) and tb_cell.ch$set(memorySegment, value). Of course you are not required to do FFI, you may want to use this API to speed up some very memory-sensitive operation. Then you can define your own memory layout, specifying precisely endianness, alignment, padding, anything, and access it comfortably through these APIs.