class T::Props::Private::ApplyFixedDefault

def initialize(default, accessor_key, setter_proc)
  # FIXME: Ideally we'd check here that the default is actually a valid
  # value for this field, but existing code relies on the fact that we don't.
  #
  # :(
  #
  # setter_proc.call(default)
  @default = T.let(default, BasicObject)
  super(accessor_key, setter_proc)
end

def set_default(instance)
  instance.instance_variable_set(@accessor_key, default)
end