def fft_ifftn(context, node):
    """Lowers torch.fft.ifftn by the dialect op `complex_ifftn` from complex_dialect_ops.py."""
    input_data, shapes, dims, norm = _get_inputs(context, node, expected=[4])
    ifftn_res = mb.complex_ifftn(data=input_data, shapes=shapes, dims=dims, norm=norm)
    context.add(ifftn_res, node.name)
Lowers torch.fft.ifftn by the dialect op `complex_ifftn` from complex_dialect_ops.py.
coremltools/converters/mil/frontend/torch/ops.py