code: func (pc *PCCloud) InstanceTypeByProviderID(ctx context.Context, providerID string) (string, error) {
  	return "", cloudprovider.NotImplemented
  }
docs: // InstanceTypeByProviderID returns the cloudprovider instance type of the node with the specified unique providerID
  // This method will not be called from the node that is requesting this ID. i.e. metadata service
  // and other local methods cannot be used here