| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| k8s.io/apiextensions-apiserver/pkg/apis/apiextensions | Package apiextensions is the internal version of the API. |
| k8s.io/apimachinery/pkg/runtime | Package runtime defines conversions between generic types and structs to map query strings to struct objects. |
| k8s.io/apimachinery/pkg/util/validation/field | |
| k8s.io/kube-openapi/pkg/validation/spec | |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| regexp | Package regexp implements regular expression search. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |