Changes the data for the item pointed to by iter to be data. If the sequence has a data destroy function associated with it, that function is called on the existing data that iter pointed to.
a glib.SequenceIter
new data for the item
2.14
Changes the data for the item pointed to by iter to be data. If the sequence has a data destroy function associated with it, that function is called on the existing data that iter pointed to.