/*
 *  call-seq:
 *     fi.indexed? -> bool
 *
 *  Return true if the field is indexed, ie searchable in the index.
 */
static VALUE
frt_fi_is_indexed(VALUE self)
{
    FieldInfo *fi = (FieldInfo *)DATA_PTR(self);
    return fi_is_indexed(fi) ? Qtrue : Qfalse;
}