# File lib/innodb/space.rb, line 459
  def each_xdes
    unless block_given?
      return enum_for(:each_xdes)
    end

    each_xdes_page do |xdes_page|
      xdes_page.each_xdes do |xdes|
        # Only return initialized XDES entries; :state will be nil for extents
        # that have not been allocated yet.
        yield xdes if xdes.xdes[:state]
      end
    end
  end