User function that is called to determine if the @item should be matched.
If the filter matches the item, this function must return %TRUE. If the item should be filtered out, %FALSE must be returned.
%TRUE to keep the item around
See Implementation
User function that is called to determine if the @item should be matched.
If the filter matches the item, this function must return %TRUE. If the item should be filtered out, %FALSE must be returned.