Returns a list of instances that have their parent property set to nil.
function getnilinstances(): { Instance }
Example
local DummyPart = Instance.new("Part")
DummyPart.Parent = nil
for IndexNil, ValueNil in pairs(getnilinstances()) do
if ValueNil == DummyPart then
print(`Found the wanted nil instance: {DummyPart}`)
end
end