{{
    enums = x.enums
    beans = x.beans
    tables = x.tables
}}
local setmetatable = setmetatable
local pairs = pairs
local ipairs = ipairs
local tinsert = table.insert

local function SimpleClass()
    local class = {}
    class.__index = class
    class.New = function(...)
        local ctor = class.ctor
        local o = ctor and ctor(...) or {}
        setmetatable(o, class)
        return o
    end
    return class
end


local function get_map_size(m)
    local n = 0
    for _ in pairs(m) do
        n = n + 1
    end
    return n
end