local setmetatable, getmetatable = setmetatable, getmetatable;
local ipairs, unpack, select = ipairs, table.unpack or unpack, select; --luacheck: ignore 113
local tonumber, tostring = tonumber, tostring;
+local type = type;
local assert, pcall, xpcall, debug_traceback = assert, pcall, xpcall, debug.traceback;
local t_concat = table.concat;
local s_char = string.char;