testValues := []string{"100m", "1Gi"}
	zero := MustParse("0")
	for _, testValue := range testValues {
		value := MustParse(testValue)
		v1 := value.DeepCopy()
		// ensure non-zero - zero = non-zero (suffix preserved)
		v1.Sub(zero)
		// ensure we preserved the input value
		if v1.String() != testValue {
			t.Errorf("Expected %v, actual %v", testValue, v1.String())
		}

    # is not backloaded into Python.
    if name_str == 'ag__':
      return {type(AG_MODULE)}, AG_MODULE

    return None, None

  def res_value(self, ns, value):
    # resolves the type of the symbol by the metadata in 'value'
    if value is None:
      return {TFRTypes.NONE}
    if value in (TFRTypes.SHAPE, TFRTypes.TF_TENSOR_SHAPE_FUNC):