You're seeing just the function new, go back to Binance.Order module for more information.
Link to this function

new(map_or_kwlist, opts \\ [])


new(ExConstructor.map_or_kwlist(), Keyword.t()) :: %Binance.Order{
  client_order_id: term(),
  cummulative_quote_qty: term(),
  executed_qty: term(),
  iceberg_qty: term(),
  is_working: term(),
  order_id: term(),
  orig_qty: term(),
  price: term(),
  side: term(),
  status: term(),
  stop_price: term(),
  symbol: term(),
  time: term(),
  time_in_force: term(),
  type: term(),
  update_time: term()