code: @Override
    public ApiFuture<Void> dropRowRangeAsync(String tableId, String rowKeyPrefix) {
      Preconditions.checkNotNull(rowKeyPrefix);
      DropRowRangeRequest protoRequest =
          DropRowRangeRequest.newBuilder()
              .setName(instanceName.toTableNameStr(tableId))
              .setDeleteAllDataFromTable(false)
              .setRowKeyPrefix(ByteString.copyFromUtf8(rowKeyPrefix))
              .build();
      return ApiFutureUtil.transformAndAdapt(
          delegate.dropRowRangeAsync(protoRequest),
          new Function<Empty, Void>() {
            @Override
            public Void apply(Empty empty) {
              return null;
            }
          });
    }
docs: {@inheritDoc}