@type capture() ::
  {pos_integer(), non_neg_integer(), pos_integer(), non_neg_integer(),
   String.t()}

@type span() :: {non_neg_integer(), non_neg_integer(), atom()}

@type t() :: %Drafter.Syntax.TSFeatures{
  folds: list(),
  highlights: %{required(pos_integer()) => [span()]},
  symbols: list(),
  textobjects: list()
}