# File lib/bundler/plugin.rb, line 198
    def save_plugins(plugins, specs, optional_plugins = [])
      plugins.each do |name|
        spec = specs[name]
        validate_plugin! Pathname.new(spec.full_gem_path)
        installed = register_plugin(name, spec, optional_plugins.include?(name))
        Bundler.ui.info "Installed plugin #{name}" if installed
      end
    end