Move from a singular bit_width field to a block_offsets child to support non-constant bit widths.
All other functionality should stay the same. Do not support non-sequential offsets for now (block offsets created from a constant bitwidth can always be represented by a SequenceArray).
Move from a singular
bit_widthfield to ablock_offsetschild to support non-constant bit widths.All other functionality should stay the same. Do not support non-sequential offsets for now (block offsets created from a constant bitwidth can always be represented by a
SequenceArray).