(NSInteger)treeView:(RATreeView *)treeView numberOfChildrenOfItem:(id)item

[Xcode123456]

Hello, author. I have a question.
Why doesn't the
[self.treeView reloadRowsForItems:@[parentModel] withRowAnimation:RATreeViewRowAnimationAutomatic]
method call the
*(NSInteger)treeView:(RATreeView )treeView numberOfChildrenOfItem:(id)item method。

How do I want to refresh a parent node and retrieve the number of parent nodes?

I look forward to your reply. Thank you.
English is not good, machine translation