| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/spf13/pflag | Package pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags. |
| k8s.io/apimachinery/pkg/util/wait | Package wait provides tools for polling or listening for changes to a condition. |
| k8s.io/klog | Package klog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup. |
| log | Package log implements a simple logging package. |
| time | Package time provides functionality for measuring and displaying time. |