code: public boolean removeMenuItem (String command)
      {
          int icount = _items.size();
          for (int i = 0; i < icount; i++) {
              RadialMenuItem item = _items.get(i);
              if (item.command.equals(command)) {
                  _items.remove(i);
                  return true;
              }
          }
  
          return false;
      }
docs: Removes the first menu item that matches the specified command from this menu.
  
  @return true if a matching menu item was removed, false if not.