A function used by gtk_tree_selection_set_select_function() to filter whether or not a row may be selected. It is called whenever a row's state might change. A return value of %TRUE indicates to @selection that it is okay to change the selection.
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A function used by gtk_tree_selection_set_select_function() to filter whether or not a row may be selected. It is called whenever a row's state might change. A return value of %TRUE indicates to @selection that it is okay to change the selection.