to_hash

# File activesupport/lib/active_support/hash_with_indifferent_access.rb, line 355
    def to_hash
      _new_hash = Hash.new
      set_defaults(_new_hash)

      each do |key, value|
        _new_hash[key] = convert_value(value, for: :to_hash)
      end
      _new_hash
    end

    private
      def convert_key(key) # :doc:
        key.kind_of?(Symbol) ? key.to_s : key
      end

      def convert_value(value, options = {}) # :doc:
        if value.is_a? Hash
          if options[:for] == :to_hash
            value.to_hash
          else
            value.nested_under_indifferent_access
          end
        elsif value.is_a?(Array)
          if options[:for] != :assignment || value.frozen?
            value = value.dup
          end
          value.map! { |e| convert_value(e, options) }
        else
          value
        end
      end

      def set_defaults(target) # :doc:
        if default_proc
          target.default_proc = default_proc.dup
        else
          target.default = default
        end
      end
  end