code: def isUnbounded(self):
      return self._unBounded
  
imports: from ..utils import _get_feature, _get_nn_layers, _get_input_names
  from ...None import _MINIMUM_FLEXIBLE_SHAPES_SPEC_VERSION
  from ...None import _MINIMUM_NDARRAY_SPEC_VERSION
label_desc: Use image node_id 4 for calling the ShapeRange obj's underlying member method code with example usage: obj.isUnbounded() and returns: self