/* 
 *  call-seq:
 *     index_reader.undelete_all -> index_reader
 *
 *  Undelete all deleted documents in the index. This is kind of like a
 *  rollback feature. Not that once an index is committed or a merge happens
 *  during index, deletions will be committed and undelete_all will have no
 *  effect on these documents.
 */
static VALUE
frt_ir_undelete_all(VALUE self)
{
    IndexReader *ir = (IndexReader *)DATA_PTR(self);
    ir_undelete_all(ir);
    return self;
}