class_docstr: Python interface for VegaFusion DataFrame
docstr: Return DataFrame's value as a pyarrow Table
docstr_tok: ["Return","DataFrame","'s","value","as","a","pyarrow","Table"]
code: def collect(self) -> pa.Table:
      """Return DataFrame's value as a pyarrow Table"""
      raise NotImplementedError()
  
imports: from abc import ABC, abstractmethod
  import pyarrow
  from vegafusion.proto.datafusion_pb2 import LogicalExprNode
  from typing import Optional, List, Literal, Union, Any
label_desc: Use image node_id 2 for calling the DataFrameDataset obj's underlying member method code with example usage: obj.collect() without return types