Add comments

internal/k8s/client/client.go

@@ -181,7 +181,9 @@ func (*client) LabelSelector(key string, op selection.Operator, vals []string) (
 	return labels.NewSelector().Add(*requirements), nil
 }
 
+// Patcher is an interface for patching resources with controller-runtime client.
 type Patcher interface {
+	// ApplyPodAnnotations applies the given annotations to the agent pod with server-side apply.
 	ApplyPodAnnotations(ctx context.Context, name, namespace string, entries map[string]string) error
 }
 

pkg/agent/core/ngt/service/option.go

@@ -329,6 +329,7 @@ func WithExportIndexInfoDuration(dur string) Option {
 	}
 }
 
+// WithPatcher returns the functional option to set the patcher for patching k8s resources.
 func WithPatcher(p client.Patcher) Option {
 	return func(n *ngt) error {
 		if p == nil {