code: def pool(self, inputs):
      raise NotImplementedError()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
  from tf_euler.python.utils import layers
label_desc: Use image node_id 3 for calling the BasePoolAggregator obj's underlying member method code with example usage: obj.pool(inputs) without return types