Add lien to API

staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/types.go

@@ -285,6 +285,18 @@ type ObjectMeta struct {
 	//
 	// +optional
 	ManagedFields []ManagedFieldsEntry `json:"managedFields,omitempty" protobuf:"bytes,17,rep,name=managedFields"`
+
+	// Liens represents the list of identifiers that require this object to be
+	// prevented from being deleted.
+	// Must be empty before the object is deleted from the registry. Each entry
+	// should contain identifier for the responsible component that will remove
+	// the entry from the list.
+	// Liens may be processed and removed in any order.
+	// Liens is a shared field, any actor with permission can reorder it.
+	// +optional
+	// +listType=set
+	// +patchStrategy=merge
+	Liens []string `json:"liens,omitempty" patchStrategy:"merge" protobuf:"bytes,18,rep,name=liens"`
 }
 
 const (