For example I have many classes than implement my interface. After adding new method definition in the interface, how can I fast-add blank interface implementations for all that classes?
Alt+Enter on the new method in the interface, Implement method:
Press Enter, the list of implementation classes will be shown, select the desired classes using Shift+arrow keys or press Ctrl+A to select all of them, then press Enter again to confirm the choice. Stub implementations will be added to all the selected classes.