Inserts @link_ into @queue before @sibling.
@sibling must be part of @queue.
a #GList link that must be part of @queue, or %NULL to push at the tail of the queue.
a #GList link to insert which must not be part of any other list.
2.62
See Implementation
Inserts @link_ into @queue before @sibling.
@sibling must be part of @queue.