The setCheckable method in the PyQt.QtGui.QStandardItem class of the Python QGIS library allows the programmer to set whether an item in a Qt model can be checked or unchecked. By calling this method and passing a boolean value, the item's checkable state can be enabled or disabled. This is particularly useful in applications where the user needs to interact with a list or tree-like structure and select multiple items using checkboxes.
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