new

# File activesupport/lib/active_support/hash_with_indifferent_access.rb, line 70
    def initialize(constructor = nil)
      if constructor.respond_to?(:to_hash)
        super()
        update(constructor)

        hash = constructor.is_a?(Hash) ? constructor : constructor.to_hash
        self.default = hash.default if hash.default
        self.default_proc = hash.default_proc if hash.default_proc
      elsif constructor.nil?
        super()
      else
        super(constructor)
      end
    end