It's more than choosing the right function call, it goes further than that. If your code has patterns, it recognises and suggests them.

For instance, one I find very useful is that we have this pattern of checking the result of a function call, logging the error and returning, or whatever. So now, every time you have `result = foo()`, it will auto suggest `if (!result) log_error...` with a generally very good error message.

Very basic, but damn convenient. The more patterns you use, the more helpful it becomes.