@type codewords() :: groups()

@type groups() :: {[[], ...], [[]]}

@type t() :: %QRCode.ErrorCorrection{
  blocks_in_group1: ExMaybe.t(integer()),
  blocks_in_group2: ExMaybe.t(integer()),
  codewords: ExMaybe.t(codewords()),
  codewords_per_block_in_group1: ExMaybe.t(integer()),
  codewords_per_block_in_group2: ExMaybe.t(integer()),
  ec_codewrods_per_block: ExMaybe.t(integer()),
  groups: ExMaybe.t(groups())
}