.. _TreeView.onCollapse:

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TreeView.onCollapse
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   void **onCollapse** (:ref:`ListItem` **item**)


Parameters
----------

+----------+-----------------------------------+
| **item** | The?ListItem?node that collapsed. |
+----------+-----------------------------------+



Description
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An event-handler callback function, called when the user collapses (closes) an expanded node in the treeview.