local WeakMap
do
    WeakMap = __TS__Class()
    WeakMap.name = "WeakMap"
    function WeakMap.prototype.____constructor(self, entries)
        self[Symbol.toStringTag] = "WeakMap"
        self.items = {}
        setmetatable(self.items, {__mode = "k"})
        if entries == nil then
            return
        end
        local iterable = entries
        if iterable[Symbol.iterator] then
            local iterator = iterable[Symbol.iterator](iterable)
            while true do
                local result = iterator:next()
                if result.done then
                    break
                end
                local value = result.value
                self.items[value[1]] = value[2]
            end
        else
            for ____, kvp in ipairs(entries) do
                self.items[kvp[1]] = kvp[2]
            end
        end
    end
    function WeakMap.prototype.delete(self, key)
        local contains = self:has(key)
        self.items[key] = nil
        return contains
    end
    function WeakMap.prototype.get(self, key)
        return self.items[key]
    end
    function WeakMap.prototype.has(self, key)
        return self.items[key] ~= nil
    end
    function WeakMap.prototype.set(self, key, value)
        self.items[key] = value
        return self
    end
    WeakMap[Symbol.species] = WeakMap
end