The function that will be called after the next item of the iterator
has been retrieved. This function will typically increase the refcount
of the item or make a copy.
Implementors of a #GstIterator should implement this
function and pass it to the constructor of the custom iterator.
The function will be called with the iterator lock held.
The function that will be called after the next item of the iterator has been retrieved. This function will typically increase the refcount of the item or make a copy. Implementors of a #GstIterator should implement this function and pass it to the constructor of the custom iterator. The function will be called with the iterator lock held.