private void initIds() { if (containers != null) { return; } StrictPreemptionContractProtoOrBuilder p = viaProto ? proto : builder; List<PreemptionContainerProto> list = p.getContainerList(); containers = new HashSet<PreemptionContainer>(); for (PreemptionContainerProto c : list) { containers.add(convertFromProtoFormat(c)); } }