# File lib/rhc/core_ext.rb, line 53
  def stringify_keys!
    keys.each do |key|
      v = delete(key)
      if v.is_a? Hash
        v.stringify_keys!
      elsif v.is_a? Array
        v.each{ |value| value.stringify_keys! if value.is_a? Hash }
      end
      self[(key.to_s rescue key) || key] = v
    end
    self
  end