load_panes_from_previous_session = function()
	if Initial_load_filenames == nil then return end
	for _,filename in ipairs(Initial_load_filenames) do
		table.insert(Panes, new_pane())
		Current_pane_index = #Panes
		Current_pane = Panes[Current_pane_index]
		Current_pane.filename = filename
		one_time_load()
	end
end

-- List of filenames loaded from settings that on.initialize will load into Panes.
-- It's particularly unfortunate that this is a global.
Initial_load_filenames = nil

filenames_from_all_panes = function()
	local result = {}
	for _,pane in ipairs(Panes) do
		if pane.filename then
			table.insert(result, pane.filename)
		end
	end
	return result
end

	Initial_load_filenames = settings.loaded_filenames

		loaded_filenames = filenames_from_all_panes(),

	table.insert(Panes, new_pane())

	load_panes_from_previous_session()
	if #Panes == 0 then
		table.insert(Panes, new_pane())
	end