code: private void deleteLinkInverseValue(String targetObjID) {
          int shardNo = m_tableDef.getShardNumber(m_dbObj);
          if (shardNo > 0 && m_invLinkDef.isSharded()) {
              m_dbTran.deleteShardedLinkValue(targetObjID, m_invLinkDef, m_dbObj.getObjectID(), shardNo);
          } else {
              m_dbTran.deleteLinkValue(targetObjID, m_invLinkDef, m_dbObj.getObjectID());
          }
      }
docs: Delete the inverse reference to the given target object ID.