gtk:tree-view-column-cell-set-cell-data (column model iter expander expanded)

column -- a gtk:tree-view-column object
model -- a gtk:tree-model object to get the attributes of the cell renderer from
iter -- a gtk:tree-iter iterator to get the attributes of the cell renderer from
expander -- true, if the row has children
expanded -- true, if the row has visible children

Sets the cell renderer based on the tree model and iter. That is, for every attribute mapping in the tree view column, it will get a value from the set column on iter, and use that value to set the attribute on the cell renderer. This is used primarily by the tree view.