code: def has_flat_params(self):
      return False
  
imports: from collections import defaultdict
  from itertools import chain
  import torch
  from omegaconf import DictConfig
  from fairseq import optim
  from .dynamic_loss_scaler import DynamicLossScaler
label_desc: Use image node_id 2 for calling the _MemoryEfficientFP16OptimizerMixin obj's underlying member method code with example usage: obj.has_flat_params() and returns: False