code: func (api *API) StoreAndBroadcast(trytes []Trytes) ([]Trytes, error) {
  	if err := Validate(ValidateAttachedTransactionTrytes(trytes...)); err != nil {
  		return nil, err
  	}
  	trytes, err := api.StoreTransactions(trytes...)
  	if err != nil {
  		return nil, err
  	}
  	return api.BroadcastTransactions(trytes...)
  }
docs: // StoreAndBroadcast first stores and the broadcasts the given transactions.