class_docstr: Global feature extractor module
class_docstr_tok: ["Global","feature","extractor","module"]
code: def hybrid_forward(self, F, x):
      x = self.bottleneck1(x)
      x = self.bottleneck2(x)
      x = self.bottleneck3(x)
      x = self.ppm(x)
      return x
  
imports: from mxnet.context import cpu
  from mxnet.gluon.block import HybridBlock
  from mxnet.gluon import nn
label_desc: Use image node_id 3 for calling the GlobalFeatureExtractor obj's underlying member method code with example usage: obj.hybrid_forward(F, x) and returns: x