Get normal from an object-space based on NormalId

function GetNormal(part, normalId)
    if normalId == Enum.NormalId.Front then
        normalId = Enum.NormalId.Back
    elseif normalId == Enum.NormalId.Back then
        normalId = Enum.NormalId.Front
    end
    local v = Vector3.FromNormalId(normalId)
    return (part.CFrame:vectorToWorldSpace(v))
end