@type t() :: %Alpa.Models.Activity{
  activity_type: String.t() | nil,
  cum_qty: Decimal.t() | nil,
  date: Date.t() | nil,
  description: String.t() | nil,
  id: String.t() | nil,
  leaves_qty: Decimal.t() | nil,
  net_amount: Decimal.t() | nil,
  order_id: String.t() | nil,
  per_share_amount: Decimal.t() | nil,
  price: Decimal.t() | nil,
  qty: Decimal.t() | nil,
  side: String.t() | nil,
  status: String.t() | nil,
  symbol: String.t() | nil,
  transaction_time: DateTime.t() | nil,
  type: String.t() | nil
}