TreeCellDataFunc   
    typealias TreeCellDataFunc = (treeColumn: TreeViewColumn, cell: CellRenderer, treeModel: TreeModel, iter: TreeIter) -> Unit(source)
A function to set the properties of a cell instead of just using the straight mapping between the cell and the model.
This function is useful for customizing the cell renderer. For example, a function might get an* integer from the @tree_model, and render it to the “text” attribute of “cell” by converting it to its written equivalent.
See also: gtk_tree_view_column_set_cell_data_func()
- param - treeColumnA- GtkTreeViewColumn
- param - cellThe- GtkCellRendererthat is being rendered by @tree_column
- param - treeModelThe- GtkTreeModelbeing rendered
- param - iterA- GtkTreeIterof the current row rendered