def list# {{{
      # options = {}
      # opts = OptionParser.new { |opts| opts.banner = "vagrant snap list" }
      # argv = parse_options(opts)
      # # p argv
      safe_with_target_vms(target_vmname) do |vm|
        VBox::SnapShot.parse_tree( vm.uuid )
        puts VBox::SnapShot.tree ? VBox::SnapShot.show : "no snapshot"
      end
    end
def list# {{{
      # options = {}
      # opts = OptionParser.new { |opts| opts.banner = "vagrant snap list" }
      # argv = parse_options(opts)
      # # p argv
      safe_with_target_vms(target_vmname) do |vm|
        VBox::SnapShot.parse_tree( vm.uuid )
        puts VBox::SnapShot.tree ? VBox::SnapShot.show : "no snapshot"
      end
    end
}}}