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

column -- a gtk-tree-view-column object
model -- the gtk-tree-model to to get the cell renderers attributes from
iter -- the gtk-tree-iter to to get the cell renderer's attributes from
is-expander -- true, if the row has children
is-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 the iter, and use that value to set the attribute on the cell renderer. This is used primarily by the tree view.