code: def _is_rectangle_annotation(ann):
      return "type" not in ann or ann["type"] == "rectangle"
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import turicreate
label_desc: Use image node_id 2 for calling a global function with example usage: _is_rectangle_annotation(ann) and returns: unknown