Qt Assistant文档Model/View Programming有误!? [复制链接]

大家看一下以下Model/View Programming中的内容（红色）是否有误：


<TR topAlign?>
insertRows()
Used to add new rows and items of data to all types of model. Implementations must call beginInsertRows() before inserting new rows into any underlying data structures, and call endInsertRows() immediately afterwards.<TR topAlign?>
removeRows()
Used to remove rows and the items of data they contain from all types of model. Implementations must call beginRemoveRows() before inserting new columns into any underlying data structures, and call endRemoveRows() immediately afterwards.<TR topAlign?>
insertColumns()
Used to add new columns and items of data to table models and hierarchical models. Implementations must call beginInsertColumns() before rows are removed from any underlying data structures, and call endInsertColumns() immediately afterwards.<TR topAlign?>
removeColumns()
Used to remove columns and the items of data they contain from table models and hierarchical models. Implementations must call beginRemoveColumns() before columns are removed from any underlying data structures, and call endRemoveColumns() immediately afterwards.

Sorry, 涂不上红色。大家仔细看一下第2和第3项。

有什么问题吗？

我对项视图及模型编程还不是很了解，对这个问题不确定。只是发现前面的函数跟后面的解释不对应。请看图：

图片:Model&View.PNG

没有人觉得有问题吗？