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public AllianceEntity getByMember(BigInteger dcgId) {
        for (AllianceEntity alliance : getAll()) {
            if (String.valueOf(alliance.getAdminDcgId()).equals(String.valueOf(dcgId))) {
                return alliance;
            }
            for (BigInteger memberDcgId : alliance.getMembersAsList()) {
                if (String.valueOf(memberDcgId).equals(String.valueOf(dcgId))) {
                    return alliance;
                }
            }
            for (BigInteger officerDcgId : alliance.getOfficersAsList()) {
                if (String.valueOf(officerDcgId).equals(String.valueOf(dcgId))) {
                    return alliance;
                }
            }
        }
        return null;
    }