code: def path(self):
      return "rl_coach.agents.ddqn_agent:DDQNAgent"
  
file_path: coach/rl_coach/agents/ddqn_agent.py
imports: from typing import Union
  import numpy
  from rl_coach.agents.dqn_agent import DQNAgent, DQNAgentParameters
  from rl_coach.core_types import EnvironmentSteps
  from rl_coach.schedules import LinearSchedule
label_desc: Use image node_id 2 for calling the DDQNAgentParameters obj's underlying member method code with example usage: obj.path() and returns: str