code: def merge(self, merge_result: W, to_be_merged: Iterable[W]):
      self.merge_results[merge_result] = to_be_merged
  
imports: from abc import abstractmethod, ABC
  from typing import Generic, List, Iterable, Dict, Set
  from pyflink.common import Row
  from pyflink.common.constants import MAX_LONG_VALUE
  from pyflink.datastream.state import MapState
  from pyflink.fn_execution.table.window_assigner import WindowAssigner, PanedWindowAssigner, MergingWindowAssigner
  from pyflink.fn_execution.table.window_context import Context, K, W
label_desc: Use image node_id 2 for calling the MergeResultCollector obj's underlying member method code with example usage: obj.merge(merge_result, to_be_merged) without return types