retailProposal.obtainSecondApplicant().ifPresent(
                retailProposalSecondApplicant -> appInfo.obtainSecondApplicant().ifPresent(
                        appInfoSecondApplicant -> retailProposalSecondApplicant.getInvolvedPartnerRole()
                                .getPartner().setNumber(
                                        appInfoSecondApplicant.getInvolvedPartnerRole().getPartner().getNumber())));