class_docstr: unknown is basically Any type.
code: def __init__(self, val=None):
      self.val = val
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from .type_spec import Type
label_desc: Use image node_id 2 to create a new unknown object  with example: obj = unknown(val)