code: private int getTargetObjectShardNumber(String targetObjID) {
          int targetShardNo = 0;
          if (m_invTableDef.isSharded() &&
              m_targetObjShardNos != null &&
              m_targetObjShardNos.containsKey(targetObjID)) {
              targetShardNo = m_targetObjShardNos.get(targetObjID);
          }
          return targetShardNo;
      }
docs: Get the shard number of the target object ID, if cached.