code: @Deprecated
    public synchronized BigtableTableAdminClient getTableAdminClient() throws IOException {
      if (tableAdminClient == null) {
        ManagedChannel channel = createManagedPool(options.getAdminHost(), 1);
        tableAdminClient = new BigtableTableAdminGrpcClient(channel,
            BigtableSessionSharedThreadPools.getInstance().getRetryExecutor(), options);
      }
      return tableAdminClient;
    }
docs: <p>Getter for the field <code>tableAdminClient</code>.</p>
  
  @deprecated Please use {@link #getTableAdminClientWrapper()}.
  
  @return a {@link com.google.cloud.bigtable.grpc.BigtableTableAdminClient} object.
  @throws java.io.IOException if any.