class Dry::Configurable::Setting

def initialize(name, input: Undefined, default: Undefined, **options)
  @name = name
  @writer_name = :"#{name}="
  @options = options
  # Setting collections (see `Settings`) are shared between the configurable class
  # and its `config` object, so for cloneable individual settings, we duplicate
  # their _values_ as early as possible to ensure no impact from unintended mutation
  @input = input
  @default = default
  if cloneable?
    @input = input.dup
    @default = default.dup
  end
  evaluate if input_defined?
end