class_docstr: Parameter scheduler decorator used in conjunction with layer decay
  to reduce the learning rate of some specific parameter groups
code: def __call__(self, where: float):
      return self.wrapped(where) * self.lr_decay
  
file_path: vissl/vissl/optimizers/param_scheduler/layer_decay_scheduler.py
imports: from typing import Any, Dict, Union
  from classy_vision.optim.param_scheduler import ClassyParamScheduler, ConstantParamScheduler, UpdateInterval
label_desc: Use image node_id 4 for calling the LayerDecayScheduler obj's underlying member method code with example usage: obj.__call__(where) and returns: unknown