+ public Option_CVec_u8ZZ payment_metadata() {
+ long ret = bindings.RawInvoice_payment_metadata(this.ptr);
+ Reference.reachabilityFence(this);
+ if (ret >= 0 && ret <= 4096) { return null; }
+ org.ldk.structs.Option_CVec_u8ZZ ret_hu_conv = org.ldk.structs.Option_CVec_u8ZZ.constr_from_ptr(ret);
+ if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
+ return ret_hu_conv;
+ }
+