code: func ObjectMetaFor(obj runtime.Object) (*ObjectMeta, error) {
  	v, err := conversion.EnforcePtr(obj)
  	if err != nil {
  		return nil, err
  	}
  	var meta *ObjectMeta
  	err = runtime.FieldPtr(v, "ObjectMeta", &meta)
  	return meta, err
  }
docs: // ObjectMetaFor returns a pointer to a provided object's ObjectMeta.
  // TODO: allow runtime.Unknown to extract this object