code: def __init__(self, input_stream: create_InputStream):
      super(BeamInputStream, self).__init__([])
      self._input_stream = input_stream
  
file_path: flink/flink-python/pyflink/fn_execution/beam/beam_stream_slow.py
imports: from apache_beam.coders.coder_impl import create_InputStream, create_OutputStream
  from pyflink.fn_execution.stream_slow import InputStream
  from pyflink.fn_execution.utils.operation_utils import PeriodicThread
label_desc: Use image node_id 1 to create a new BeamInputStream object from inherited base classes: InputStream with example: obj = BeamInputStream(input_stream)