code: def serial(self, obj: pa_types, context: Dict):
      sink = pa.BufferOutputStream()
      writer = pa.RecordBatchStreamWriter(sink, obj.schema)
      if isinstance(obj, pa.Table):
          batch_type = "T"
          writer.write_table(obj)
      else:
          batch_type = "B"
          writer.write_batch(obj)
      writer.close()
  
      buf = sink.getvalue()
      buffers = [buf]
      return (batch_type,), buffers, True
  
imports: from typing import Union, List, Dict, Any
  from .core import Serializer, buffered
label_desc: Use image node_id 1 for calling the ArrowBatchSerializer obj's underlying member method code with example usage: obj.serial(obj, context) and returns: batch_type,  buffers,  True