You have two classes that need to use each other’s features, but there is only a one-way link.
Add back pointers, and change modifiers to update both sets.
相关文章：
相似解决方案
热门标签
You have two classes that need to use each other’s features, but there is only a one-way link.
Add back pointers, and change modifiers to update both sets.
相关文章：