Geting a GtkTreeModel out of GtkTreeViewColumn

[Andrej Prsa <andrej.prsa@guest.arnes.si>]

Hello, everyone!

Could anyone please tell me if it's possible to extract the parent
GtkTreeModel out of GtkTreeViewColumn?

Or, if someone could maybe suggest a better way to extract the data from
the selected column in a function where GtkTreeViewColumn *column and int
row are arguments, e.g.

char *get_cell_contents (GtkTreeViewColumn *column, int row)
  {
  ???
  }

Thanks,

Andrej