code: def to_internal(self, value) -> IN:
      if value is None:
          return None
  
      return tuple(
          [
              self._field_data_converters[i].to_internal(item)
              for i, item in enumerate(value)
          ]
      )
  
imports: import pickle
  from abc import ABC, abstractmethod
  from typing import TypeVar, List, Tuple
  from pemja import findClass
  from pyflink.common import Row, RowKind, TypeInformation
  from pyflink.common.typeinfo import PickledBytesTypeInfo, PrimitiveArrayTypeInfo, BasicArrayTypeInfo, ObjectArrayTypeInfo, RowTypeInfo, TupleTypeInfo, MapTypeInfo, ListTypeInfo
  from pyflink.datastream import TimeWindow, CountWindow, GlobalWindow
label_desc: Use image node_id 2 for calling the FlattenRowDataConverter obj's underlying member method code with example usage: obj.to_internal(value) and returns: tuple, None