def message_identification=(value)
      raise ArgumentError.new('message_identification must be a string!') unless value.is_a?(String)

      regex = /\A([A-Za-z0-9]|[\+|\?|\/|\-|\:|\(|\)|\.|\,|\'|\ ]){1,35}\z/
      raise ArgumentError.new("message_identification does not match #{regex}!") unless value.match(regex)

      @message_identification = value
    end
def message_identification=(value)
      raise ArgumentError.new('message_identification must be a string!') unless value.is_a?(String)

      regex = /\A([A-Za-z0-9]|[\+|\?|\/|\-|\:|\(|\)|\.|\,|\'|\ ]){1,35}\z/
      raise ArgumentError.new("message_identification does not match #{regex}!") unless value.match(regex)

      @message_identification = value
    end
Set unique identifer for the message