| crypto/rand | Package rand implements a cryptographically secure random number generator. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| k8s.io/apimachinery/pkg/util/sets | Package sets has generic set and specified sets. |
| k8s.io/cluster-bootstrap/token/api | Package api (k8s.io/cluster-bootstrap/token/api) contains constants and types needed for bootstrap tokens as maintained by the BootstrapSigner and TokenCleaner controllers (in k8s.io/kubernetes/pkg/controller/bootstrap) |
| math/big | Package big implements arbitrary-precision arithmetic (big numbers). |
| regexp | Package regexp implements regular expression search. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |