@type t() :: %Figler.Schema.AppearBehavior{
  direction: Figler.Schema.RelativeDirection.t() | nil,
  enter_state: Figler.Schema.NodeChange.t() | nil,
  enter_transition: Figler.Schema.BehaviorTransition.t() | nil,
  exit_state: Figler.Schema.NodeChange.t() | nil,
  exit_transition: Figler.Schema.BehaviorTransition.t() | nil,
  is_deleted: boolean() | nil,
  other_layer: Figler.Schema.GUID.t() | nil,
  plays_once: boolean() | nil,
  plays_once_var: Figler.Schema.VariableData.t() | nil,
  trigger: Figler.Schema.AppearBehaviorTrigger.t() | nil
}