def collect_with_number(number, key, &block)
  opts = {}
  opts[key] = MAX_NUM_RESULTS
  statuses = collect_with_max_id do |max_id|
    opts[:max_id] = max_id unless max_id.nil?
    opts[key] = number unless number >= MAX_NUM_RESULTS
    if number > 0
      # Instead of this:
      # number -= MAX_NUM_RESULTS
      statuses = retryable(:tries => 3, :on => Twitter::Error::ServerError, :sleep => 0) do
        yield opts
      end
      # Do this:
      number -= statuses.length
      statuses
    end
  end.flatten.compact
end