docstr: Returns the key that is bound to this timer.
docstr_tok: ["Returns","the","key","that","is","bound","to","this","timer","."]
code: def get_key(self) -> K:
      """
      Returns the key that is bound to this timer.
      """
      pass
  
file_path: flink/flink-python/pyflink/fn_execution/datastream/timerservice.py
imports: from abc import abstractmethod, ABC
  from typing import Generic, TypeVar
label_desc: Use image node_id 2 for calling the InternalTimer obj's underlying member method code with example usage: obj.get_key() without return types