init method
Implementation
Future<void> init(SchemaMetaData smd, SchemaMetaData smdSys, DbTransaction transaction) async {
has_init=true;
writeWaterLine = true;
this.smd = smd;
this.smdSys = smdSys;
this.transaction = transaction;
await setWaterLine(smdSys, transaction);
wroteDto = false;
}