TreeModel is also in charge of notifying the Tree of changes to the data.
TreeModel还负责将Tree的更改通知给该数据。
TreeModel is in charge of certain tasks, such as connecting to the data source, lazy loading, and querying from the Tree widget about items and the hierarchy of items.
TreeModel负责某些任务，比如连接到数据源、延迟加载、以及从Tree小部件查询条目和条目层次结构。
TreeModel is in charge of certain tasks, such as connecting to the data source, lazy loading, and querying from the Tree widget about items and the hierarchy of items.
TreeModel负责某些任务，比如连接到数据源、延迟加载、以及从Tree小部件查询条目和条目层次结构。
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