code: def process_element(self, value):
      return self._process_element_func(value)
  
imports: from pyflink.datastream import OutputTag
  from pyflink.datastream.window import WindowOperationDescriptor
  from pyflink.fn_execution import pickle
  from pyflink.fn_execution.coders import TimeWindowCoder, CountWindowCoder
  from pyflink.fn_execution.datastream import operations
  from pyflink.fn_execution.datastream.embedded.process_function import InternalProcessFunctionContext, InternalKeyedProcessFunctionContext, InternalKeyedProcessFunctionOnTimerContext, InternalWindowTimerContext, InternalBroadcastProcessFunctionContext, InternalBroadcastProcessFunctionReadOnlyContext, InternalKeyedBroadcastProcessFunctionContext, InternalKeyedBroadcastProcessFunctionReadOnlyContext, InternalKeyedBroadcastProcessFunctionOnTimerContext
  from pyflink.fn_execution.datastream.embedded.runtime_context import StreamingRuntimeContext
  from pyflink.fn_execution.datastream.embedded.side_output_context import SideOutputContext
  from pyflink.fn_execution.datastream.embedded.timerservice_impl import InternalTimerServiceImpl
  from pyflink.fn_execution.datastream.window.window_operator import WindowOperator
  from pyflink.fn_execution.embedded.converters import TimeWindowConverter, CountWindowConverter, GlobalWindowConverter
  from pyflink.fn_execution.embedded.state_impl import KeyedStateBackend
label_desc: Use image node_id 4 for calling the OneInputOperation obj's underlying member method code with example usage: obj.process_element(value) and returns: self