How to mark code in which you don’t know what to write, but you need to remember to write it in the future?

Question

android studio

For example, I need to create a database, a pojo, an interface, and today, for example, I decided to only create a database, are there any labels that can be left in the code, and is there any search for these notes, so that when the next time you run them all and decide where to write code next?

Answer 1

//TODO