code: @SuppressWarnings("unchecked")
      @Override
      public Boolean execute() {
          try {
              api.changeRoomCapacity(CommandUtil.getSfsUser(owner, api),
                      CommandUtil.getSfsRoom(targetRoom, extension), 
                      maxUsers, maxSpectators);
          } catch (SFSRoomException e) {
              throw new IllegalStateException(e);
          }
          return Boolean.TRUE;
      }
docs: /* (non-Javadoc)
  @see com.tvd12.ezyfox.core.command.BaseCommand#execute()