code: func (endpointsStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
  	errorList := validation.ValidateEndpoints(obj.(*api.Endpoints))
  	errorList = append(errorList, validation.ValidateEndpointsUpdate(obj.(*api.Endpoints), old.(*api.Endpoints))...)
  	errorList = append(errorList, validation.ValidateConditionalEndpoints(obj.(*api.Endpoints), old.(*api.Endpoints))...)
  	return errorList
  }
docs: // ValidateUpdate is the default update validation for an end user.