code: def build(self) -> Block:
      columns = {
          key: convert_udf_returns_to_numpy(col)
          for key, col in self._columns.items()
      }
      if columns:
          tables = [self._table_from_pydict(columns)]
      else:
          tables = []
      tables.extend(self._tables)
      if len(tables) > 0:
          return self._concat_tables(tables)
      else:
          return self._empty_table()
  
imports: import collections
  from typing import TYPE_CHECKING, Any, Dict, Iterator, List, Mapping, TypeVar, Union
  import numpy
  from ray.air.constants import TENSOR_COLUMN_NAME
  from ray.data._internal.block_builder import BlockBuilder
  from ray.data._internal.numpy_support import convert_udf_returns_to_numpy, is_array_like
  from ray.data._internal.size_estimator import SizeEstimator
  from ray.data.block import Block, BlockAccessor
  from ray.data.row import TableRow
label_desc: Use image node_id 9 for calling the TableBlockBuilder obj's underlying member method code with example usage: obj.build() and returns: self, self