Suggestion to integrate fiber pool inside iterator.rb

require 'em-synchrony'
require 'em-synchrony/em-http'
require 'em-synchrony/iterator'

=begin
  Currently Synchrony::Iterator does not support synced calls inside,
  but it can by integrating fiber pool inside.

  It even makes more sense for concurrency option of Iterator to be fiber pool size.
=end

EM.run do
  urls = Array.new(5, 'http://ya.ru')

  EM::Synchrony::Iterator.new(urls, 5).each do
    # currently fails with "yield from root fiber"
    EM::HttpRequest.new(url).get # or any other synced evented call
    puts '+1'
  end

  EM.stop
end