class_docstr: Concatenate variables along a new axis.
class_docstr_tok: ["Concatenate","variables","along","a","new","axis","."]
code: def forward_chainerx(self, xs):
      return (chainerx.stack(xs, self.axis),)
  
file_path: chainer/chainer/functions/array/stack.py
imports: import chainer
  from chainer import backend
  from chainer import function_node
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 4 for calling the Stack obj's underlying member method code with example usage: obj.forward_chainerx(xs) and returns: chainerx