>>> transform = ts.IndexTransform(
...     input_inclusive_min=[1, 2, -1],
...     implicit_lower_bounds=[1, 0, 0],
...     input_shape=[3, 2, 2],
...     implicit_upper_bounds=[0, 1, 0],
...     input_labels=['x', 'y', 'z'],
...     output=[
...         ts.OutputIndexMap(offset=7, stride=13, input_dimension=1),
...         ts.OutputIndexMap(offset=8),
...         ts.OutputIndexMap(
...             offset=1,
...             stride=-2,
...             index_array=[[[1, 2]]],
...             index_range=ts.Dim(inclusive_min=-3, exclusive_max=10),
...         ),
...     ],
... )
>>> transform.to_json()
{'input_exclusive_max': [4, [4], 1],
 'input_inclusive_min': [[1], 2, -1],
 'input_labels': ['x', 'y', 'z'],
 'output': [{'input_dimension': 1, 'offset': 7, 'stride': 13},
            {'offset': 8},
            {'index_array': [[[1, 2]]], 'offset': 1, 'stride': -2}]}