@attr_reader [String] auto_scaling_group_name

@attr_reader [String] cause

@attr_reader [nil,String] description

@attr_reader [String] details

@attr_reader [Time] start_time

@attr_reader [nil,Time] end_time

@attr_reader [Integer] progress

@attr_reader [nil,String] status_code

@attr_reader [nil,String] status_message