Document doc = new Document();
//Customer Credit Transfer Initiation
doc.setCstmrCdtTrfInitn(new CustomerCreditTransferInitiationV03());
doc.getCstmrCdtTrfInitn().setGrpHdr(new GroupHeaderSCT());
final String sepaId = sepaParams.getProperty("sepaid");
final String pmtInfId = sepaParams.getProperty("pmtinfid");
//Group Header