# File lib/optconfig.rb, line 147
  def initialize(default_attr={})
    @default_attr = default_attr
    @option_seq = []
    @options = {}
    @file = default_attr[:file]
    @section = default_attr[:section]
    @stop_at_non_option_argument = default_attr[:stop_at_non_option_argument]
    @ignore_unknown_file_option = default_attr.key?(:ignore_unknown_file_option) ? default_attr[:ignore_unknown_file_option] : true
    @obsolete_behavior = false
    @specified = {}               # オプションが指定されたかどうかを保持
  end