code: def __str__(self):
      result = [
          "Dense (num outputs = {})".format(
              self.num_actions * self.num_atoms
          ),
          "Reshape (new size = {} x {})".format(
              self.num_actions, self.num_atoms
          ),
      ]
      return "\n".join(result)
  
file_path: coach/rl_coach/architectures/tensorflow_components/heads/quantile_regression_q_head.py
imports: import tensorflow
  import numpy
  from rl_coach.architectures.tensorflow_components.heads import QHead
  from rl_coach.architectures.tensorflow_components.layers import Dense
  from rl_coach.base_parameters import AgentParameters
  from rl_coach.spaces import SpacesDefinition
label_desc: Use image node_id 3 for calling the QuantileRegressionQHead obj's underlying member method code with example usage: obj.__str__() and returns: str