How set prefix (e.g. "m") to remove in Android Studio's Alt-Insert getter/setter?

I found the solution:

Go to File -> Other Settings -> Default Settings

In the search box, type "prefix".

On the right, select the tab "Code Generation".

In the "prefix" box, type m (or whatever your prefix is)

1. Open Default Settings (File -> Other Settings -> Default Settings)
2. Go to Editor -> Java -> Code Generation
3. Select Prefer longer names
4. Enter m in Field as prefix