class_docstr: A stripped-down callback which is focused on batches rather than epochs.
docstr: Hook called after every validation epoch.
docstr_tok: ["Hook","called","after","every","validation","epoch","."]
code: def on_validation_epoch_end(self, loss: float) -> None:
      """
      Hook called after every validation epoch.
      """
  
file_path: gluonts/src/gluonts/nursery/tsbench/src/tsbench/gluonts/callbacks/base.py
imports: from typing import List
  from mxnet import gluon
  from mxnet.gluon import nn
label_desc: Use image node_id 4 for calling the Callback obj's underlying member method code with example usage: obj.on_validation_epoch_end(loss) without return types