Imports of package validation

PathSynopsis
errorsPackage errors implements functions to manipulate errors.
k8s.io/apimachinery/pkg/util/validation/field
k8s.io/kubernetes/pkg/apis/corePackage core contains the latest (or "internal") version of the Kubernetes API objects.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.