A function to set the properties of a cell instead of just using the straight mapping between the cell and the model. This 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. This is set by calling TreeView.columnSetCellDataFunc

alias GtkTreeCellDataFunc = void function(GtkTreeViewColumn* treeColumn, GtkCellRenderer* cell, GtkTreeModel* treeModel, GtkTreeIter* iter, void* data)