Sequelize Transaction Bulk Update followed by Bulk Create

I am working with Sequelize transaction and would like to know how to do a bulk update before sequentially doing a bulk create.

My current code is something like this:

return sequelize.transaction(function(t){
  return sequelize.Promise.each(arrToUpdate, function(itemToUpdate){
    model.update(itemToUpdate, { transaction: t })
  }); 
  //How to do a sequential bulk create after the bulk update is successful in sequelize
  //transaction?
  //Bulk Create code would be return model.bulkCreate(itemsArray, { transaction: t })
});

via Chua Bing Quan