code: func (c *Client) SendMany(fromAccount string, amounts map[btcutil.Address]btcutil.Amount) (*chainhash.Hash, error) {
  	return c.SendManyAsync(fromAccount, amounts).Receive()
  }
docs: // SendMany sends multiple amounts to multiple addresses using the provided
  // account as a source of funds in a single transaction.  Only funds with the
  // default number of minimum confirmations will be used.
  //
  // See SendManyMinConf and SendManyComment for different options.
  //
  // NOTE: This function requires to the wallet to be unlocked.  See the
  // WalletPassphrase function for more details.