code: def sync_target(self, decay=None):
      if decay is None:
          decay = 1.0 - self.tau
      self.model.sync_weights_to(self.target_model, decay=decay)
  
file_path: PARL/parl/algorithms/fluid/td3.py
imports: from parl.core.fluid import layers
  from copy import deepcopy
  from paddle import fluid
  from parl.core.fluid.algorithm import Algorithm
label_desc: Use image node_id 5 for calling the TD3 obj's underlying member method code with example usage: obj.sync_target(decay) without return types