code: func (s *Scheme) AddKnownTypes(gv unversioned.GroupVersion, types ...Object) {
  	interfaces := make([]interface{}, len(types))
  	for i := range types {
  		interfaces[i] = types[i]
  	}
  	s.raw.AddKnownTypes(gv, interfaces...)
  }
docs: // AddKnownTypes registers the types of the arguments to the marshaller of the package api.
  // Encode() refuses the object unless its type is registered with AddKnownTypes.