code: public static void activate ()
      {
          // capture low-level keyboard events via the keyboard focus manager
          if (_dispatcher == null) {
              _dispatcher = new KeyEventDispatcher() {
                  public boolean dispatchKeyEvent (KeyEvent e) {
                      return DebugChords.dispatchKeyEvent(e);
                  }
              };
  
              KeyboardFocusManager keymgr =
                  KeyboardFocusManager.getCurrentKeyboardFocusManager();
              keymgr.addKeyEventDispatcher(_dispatcher);
          }
      }
docs: Initializes the debug chords services and wires up the key event
  listener that will be used to invoke the bound code.