@type t() :: %Figler.Schema.ClientBroadcast{
  cursor_reaction: Figler.Schema.CursorReaction.t() | nil,
  music: Figler.Schema.MusicInfo.t() | nil,
  presenter: Figler.Schema.PresenterInfo.t() | nil,
  prototype_presenter: Figler.Schema.PresenterInfo.t() | nil,
  session_id: non_neg_integer() | nil,
  timer: Figler.Schema.TimerInfo.t() | nil
}