require('Module:Lua class')local libraryUtil = require('libraryUtil')local TableTools = require('Module:TableTools')local warn = require('Module:Warning')
local basic_types =
local f_hashes = -- so that function elements can be properly compared and ordered in frozenset._hashlocal f_hashes_mt = setmetatable(f_hashes, f_hashes_mt)
local frozenset, _frozenset = class('frozenset',)
local set = class('set', frozenset,)
return