code: def __init__(self, internal_coder):
      self._internal_coder = internal_coder
  
imports: from apache_beam.coders import Coder
  from apache_beam.coders.coders import FastCoder, LengthPrefixCoder
  from apache_beam.portability import common_urns
  from apache_beam.typehints import typehints
  from pyflink import fn_execution
  from pyflink.fn_execution.coders import LengthPrefixBaseCoder
  from pyflink.fn_execution.flink_fn_execution_pb2 import CoderInfoDescriptor
label_desc: Use image node_id 1 to create a new FlinkCoder object from inherited base classes: FastCoder with example: obj = FlinkCoder(internal_coder)