0d38a92bcf
* Add GatherND batch_dim support * adding tests * test working * improved reference code * refactor ref func * batch dim 2 tests from tf all passed * batch_dim -> batch_dims * add example * minor change * add onnx test * fix onnx version * fix lint * remove move on batch_dims * fix pylint * fix compiler warning * add shape constraint for batch_dim and update doc * make the output shape doc clearer