For returning the value of the cell in chunk given by chunkRowIndex and
chunkColIndex and cell in the chunk given by chunkCellColIndex and
chunkCellRowIndex and setting it to newValue.
For returning the value of the cell in chunk given by chunkRowIndex and
chunkColIndex and cell in the chunk given by chunkCellColIndex and
chunkCellRowIndex and setting it to newValue.