class Dry::Types::Schema::Key

def meta(data = Undefined)
  if Undefined.equal?(data) || !data.key?(:omittable)
    super
  else
    self.class.warn(
      "Using meta for making schema keys is deprecated, " \
      "please use .omittable or .required(false) instead" \
      "\n" + Core::Deprecations::STACK.()
    )
    super.required(!data[:omittable])
  end
end