func (g *Grammar) RuleIsNulling(ruleid RuleID) int { return int(C.marpa_g_rule_is_nulling(g.handle, C.Marpa_Rule_ID(ruleid))) }
func (g Grammar) RuleIsNulling(sym_id RuleID) int { return int(C.marpa_g_rule_is_nulling(g.grammar, sym_id.id)) }