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 #GtkTreeIter-struct
the column to lookup the value at
an empty #GValue 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.