code: public void setConfirmDropMessage(boolean confirmDrop) {
          if (confirmDropMessage != confirmDrop) {
              this.confirmDropMessage = confirmDrop;
              getConfig().setProperty(PARAM_CONFIRM_DROP_MESSAGE_KEY, confirmDrop);
          }
      }
docs: Sets whether the user should confirm the drop of the trapped message.
  
  @param confirmDrop {@code true} if the user should confirm the drop, {@code false} otherwise
  @see #isConfirmDropMessage()
  @see org.zaproxy.zap.extension.brk.BreakPanelToolbarFactory#getBtnDrop()