fix#329 #324: correct the return value type and clear the interface generic. and add 2 methods.

[CorvusYe]

Warning:

• Please pay attention to whether startNodes , endNodes, listEndNodes and listStartNodes are used in the project.
  Pay attention to whether the repair work has a negative impact on actual usage

重要信息：

• 请留意项目中是否使用了 listEndNodes and listStartNodes 两个接口
  注意当前修复工作是否为实际使用情况带来负面影响。

feat: add methods: insertForce(v) insertSelectiveForce(v)

fix: #329 , #324