@type t() :: %ExCollision.TMX.Tileset{
  columns: non_neg_integer() | nil,
  first_gid: non_neg_integer(),
  name: String.t() | charlist(),
  properties: %{required(String.t()) => term()},
  tile_count: non_neg_integer() | nil,
  tile_height: non_neg_integer(),
  tile_width: non_neg_integer()
}