code: def forward_chainerx(self, x):
      return (
          chainerx.amax(x[0], axis=self.axis, keepdims=self.keepdims),
      )
  
imports: import numpy
  import six
  from chainer import backend
  from chainer import function_node
  import chainer.functions
  import chainer.utils
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 1 for calling the Max obj's underlying member method code with example usage: obj.forward_chainerx(x) and returns: chainerx