@type address() :: %{
  :city => String.t(),
  optional(:country) => String.t() | nil,
  lineOne: String.t(),
  lineTwo: String.t()
}

@type one_of_discriminated_defined() ::
  %{type: String.t()}
  | %{
      :city => String.t(),
      optional(:country) => String.t() | nil,
      lineOne: String.t(),
      lineTwo: String.t(),
      type: String.t()
    }

@type one_of_discriminated_normal() ::
  %{type: String.t()}
  | %{
      :city => String.t(),
      optional(:country) => String.t() | nil,
      lineOne: String.t(),
      lineTwo: String.t(),
      type: String.t()
    }

@type one_of_undiscriminated() :: test2() | address()

@type test2() :: integer()

@type test() :: integer() | nil