class Gem::StreamUI

def choose_from_list(question, list)
  @outs.puts question
  list.each_with_index do |item, index|
    @outs.puts " #{index + 1}. #{item}"
  end
  @outs.print "> "
  @outs.flush
  result = @ins.gets
  return nil, nil unless result
  result = result.strip.to_i - 1
  return list[result], result
end