#Find playlist by name and add to list.
	if config.has_key?('playlist')
		config['playlist'].each do |name|
			playlists.push(interface.LibrarySource.Playlists.ItemByName(name))
		end
	end
	#Create playlist and add to list.  [Note the near-identical code.]
	if config.has_key?('create-playlist')
		config['create-playlist'].each do |name|
			playlists.push(interface.CreatePlaylist(name))
		end
	end
	#...etc.

	#Invoke a block with each of the values for the given option in the given configuration.
	def with_option_values (key, config)
		if config.has_key?(key)
			config[key].each do |value|
				yield value
			end
		end
	end
	#Find playlist by name and add to list.
	with_option_values('playlist', config) do |name|
		playlists.push(interface.LibrarySource.Playlists.ItemByName(name))
	end
	#Create playlist and add to list.
	with_option_values('create-playlist', config) do |name|
		playlists.push(interface.CreatePlaylist(name))
	end