9.4 Summary
The advanced controls in SWT build on the standard concepts and API names of the toolkit. For that reason, although these controls define lots of API, they do not add many new names or concepts, making them easy to learn. Trees and tab folders support the lazy creation of items and controls using very different techniques. Trees requires a dummy item, whereas tab folders use the selection event. Although not done lazily, TableItem creation can be performed in a background thread or idle handle, freeing up the user interface.
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