code: void setSystemCursorVisible(boolean visible)
      {
          if (screen == null)
          {
              cursorVisibility = Boolean.valueOf(visible);
          }
          else
          {
              if (visible)
              {
                  screen.showCursor();
              }
              else
              {
                  screen.hideCursor();
              }
          }
      }
docs: Set the system cursor visibility.
  
  @param visible <code>true</code> if visible, <code>false</code> else.