presto-main/src/main/java/io/prestosql/operator/aggregation/state/LongDecimalWithOverflowStateSerializer.java/LongDecimalWithOverflowStateSerializer/deserialize
class LongDecimalWithOverflowStateSerializer:    @Override
    public void deserialize(Block block, int index, LongDecimalWithOverflowState state)
    {
        if (!block.isNull(index)) {
            SliceInput slice = VARBINARY.getSlice(block, index).getInput();

            state.setOverflow(slice.readLong());
            state.setLongDecimal(Slices.copyOf(slice.readSlice(slice.available())));
        }
    }