class_docstr: A builder class for blocks.
class_docstr_tok: ["A","builder","class","for","blocks","."]
docstr: Append a single row to the block being built.
docstr_tok: ["Append","a","single","row","to","the","block","being","built","."]
code: def add(self, item: T) -> None:
      """Append a single row to the block being built."""
      raise NotImplementedError
  
file_path: ray/python/ray/data/_internal/block_builder.py
imports: from typing import Generic
  from ray.data.block import Block, BlockAccessor, T
label_desc: Use image node_id 2 for calling the BlockBuilder obj's underlying member method code with example usage: obj.add(item) without return types