module AWS::Core::OptionGrammar::Descriptors::Timestamp

def encode_value(value)
  value.to_s
      value.to_s
      case value
      when Integer
      when 
      case value
      when nil, ''  then nil
      when DateTime then raw
      when Integer  then DateTime.parse(Time.at(raw).to_s) # timestamp
      else DateTime.parse(raw.to_s) # work with Time, Date and String objects
      end
end