class Acme::Client

def prepare_order_identifiers(identifiers) 

def prepare_order_identifiers(identifiers)
  if identifiers.is_a?(Hash)
    [identifiers]
  else
    Array(identifiers).map do |identifier|
      if identifier.is_a?(String)
        { type: 'dns', value: identifier }
      else
        identifier
      end
    end
  end
end