code: def hybrid_forward(self, F, x):
      return self.block(x)
  
file_path: gluon-cv/gluoncv/model_zoo/fcn.py
imports: from __future__ import division
  from mxnet.gluon import nn
  from mxnet.context import cpu
  from mxnet.gluon.nn import HybridBlock
  from .segbase import SegBaseModel
label_desc: Use image node_id 2 for calling the _FCNHead obj's underlying member method code with example usage: obj.hybrid_forward(F, x) and returns: self