message: [pdsl_core] Make SyncChunk::cell_at private
diff: @@ -289,7 +289,7 @@ impl<T> SyncChunk<T> {
  }
  /// Returns an accessor to the `n`-th cell.
  - pub(crate) fn cell_at(&mut self, n: u32) -> SyncChunkCell<T> {
  + fn cell_at(&mut self, n: u32) -> SyncChunkCell<T> {
  unsafe {
  SyncChunkCell::new_unchecked(
  self.chunk.cell_at(n),
  