composed

// Add all v1beta1 types to the scheme so that From can automatically
// determine their apiVersion and kind.
v1beta1.AddToScheme(Scheme)

// Create a strongly typed runtime.Object, imported from a provider.
b := &v1beta1.Bucket{
	ObjectMeta: metav1.ObjectMeta{
		Labels: map[string]string{
			"coolness": "high",
		},
	},
	Spec: v1beta1.BucketSpec{
		ForProvider: v1beta1.BucketParameters{
			Region: ptr.To[string]("us-east-2"),
		},
	},
}

// Create a composed resource from the runtime.Object.
cd, err := From(b)
if err != nil {
	panic(err)
}

// Marshal our composed resource to YAML. We just do this for illustration
// purposes. Normally you'd add it to the map of desired resources you send
// in your RunFunctionResponse.
y, _ := yaml.Marshal(cd)

fmt.Println(string(y))

Output:

apiVersion: s3.aws.upbound.io/v1beta1
kind: Bucket
metadata:
  labels:
    coolness: high
spec:
  forProvider:
    region: us-east-2