private void initContainersToBeRemovedFromNM() { if (this.containersToBeRemovedFromNM != null) { return; } NodeHeartbeatResponseProtoOrBuilder p = viaProto ? proto : builder; List<ContainerIdProto> list = p.getContainersToBeRemovedFromNmList(); this.containersToBeRemovedFromNM = new ArrayList<ContainerId>(); for (ContainerIdProto c : list) { this.containersToBeRemovedFromNM.add(convertFromProtoFormat(c)); } }