Initializes and sets value to that at column.
When done with value, gobject.value.Value.unset needs to be called to free any allocated memory.
the gtk.tree_iter.TreeIter
the column to lookup the value at
an empty gobject.value.Value to set
Initializes and sets value to that at column.
When done with value, gobject.value.Value.unset needs to be called to free any allocated memory.