code: public void deleteLob(long locator) throws PersistException {
          if (locator == 0) {
              return;
          }
  
          Transaction txn = mRepo.enterTransaction(IsolationLevel.READ_COMMITTED);
          try {
              StoredLob lob = mLobStorage.prepare();
              lob.setLocator(locator);
              if (lob.tryDelete()) {
                  try {
                      mLobBlockStorage.query("locator = ?").with(lob.getLocator()).deleteAll();
                  } catch (FetchException e) {
                      throw e.toPersistException();
                  }
              }
              txn.commit();
          } finally {
              txn.exit();
          }
      }
docs: Deletes Lob data, freeing up all space consumed by it.