Moves iter to the position of the previous [class@Mark] of the given category.
Returns %TRUE if iter was moved. If category is NULL, the previous source mark can be of any category.
an iterator.
category to search for, or %NULL
whether iter was moved.
See Implementation
Moves iter to the position of the previous [class@Mark] of the given category.
Returns %TRUE if iter was moved. If category is NULL, the previous source mark can be of any category.