/*
 *  call-seq:
 *     index_writer.close -> nil
 *
 *  Close the IndexWriter. This will close and free all resources used
 *  exclusively by the index writer. The garbage collector will do this
 *  automatically if not called explicitly.
 */
static VALUE
frt_iw_close(VALUE self)
{
    IndexWriter *iw = (IndexWriter *)DATA_PTR(self);
    Frt_Unwrap_Struct(self);
    iw_close(iw);
    return Qnil;
}