code: def elem_shape(self):
      if self._elem_type == types.unknown:
          return None
      elif types.is_tensor(self._elem_type):
          return self._elem_type.get_shape()
      return ()
  
imports: from typing import Optional, Union
  from coremltools.converters.mil.mil import types
  from coremltools.converters.mil.mil.types import builtin_to_string
  from coremltools.converters.mil.mil.types.symbolic import any_symbolic
label_desc: Use image node_id 6 for calling the ListVar obj's underlying member method code with example usage: obj.elem_shape() and returns: , None, self