local __TS__SetDescriptor
do
    local getmetatable = _G.getmetatable
    local function descriptorIndex(self, key)
        return __TS__DescriptorGet(
            self,
            getmetatable(self),
            key
        )
    end
    local function descriptorNewIndex(self, key, value)
        return __TS__DescriptorSet(
            self,
            getmetatable(self),
            key,
            value
        )
    end
    function __TS__SetDescriptor(target, key, desc, isPrototype)
        if isPrototype == nil then
            isPrototype = false
        end
        local ____isPrototype_0
        if isPrototype then
            ____isPrototype_0 = target
        else
            ____isPrototype_0 = getmetatable(target)
        end
        local metatable = ____isPrototype_0
        if not metatable then
            metatable = {}
            setmetatable(target, metatable)
        end
        if not isPrototype and not rawget(metatable, "_isOwnDescriptorMetatable") then
            local instanceMetatable = {}
            instanceMetatable._isOwnDescriptorMetatable = true
            setmetatable(instanceMetatable, metatable)
            setmetatable(target, instanceMetatable)
            metatable = instanceMetatable
        end
        local value = rawget(target, key)
        if value ~= nil then
            rawset(target, key, nil)
        end
        if not rawget(metatable, "_descriptors") then
            metatable._descriptors = {}
        end
        metatable._descriptors[key] = __TS__CloneDescriptor(desc)
        metatable.__index = descriptorIndex
        metatable.__newindex = descriptorNewIndex
    end
end