health() :: 1..10

points() :: integer()

t() :: %BattleCity.Tank{
  __callbacks__: [BattleCity.ContextCallback.t()],
  __index__: integer(),
  __module__: module(),
  __opts__: map(),
  changed?: boolean(),
  dead?: boolean(),
  enemy?: boolean(),
  freezed?: boolean(),
  health: health(),
  hidden?: boolean(),
  id: BattleCity.id(),
  lifes: integer(),
  meta: BattleCity.Tank.Base.t(),
  moving?: boolean(),
  position: BattleCity.Position.t(),
  reason: BattleCity.reason(),
  shield?: boolean(),
  shootable?: boolean(),
  speed: BattleCity.Position.speed(),
  with_power_up?: boolean()
}