GLua function creating

[Maud Pie]

I want to add some custom function for my addon
But I don't now how to get self
function self:IsOwned(ply)
if not self:IsVaid() then return end
if not ply:IsValid() then return end
if self:GetOwner() == ply then
return true
else
return false
end
end
Here a code
Sorry for grammar
Help me plz

[ubre]