Type start_indices_element_type =
        mlir::cast<ShapedType>(op.getStartIndices().front().getType())
            .getElementType();

    // The mhlo dynamic_slice's start_indices can be either signed/unsigned
    // int32/int64. However, TF only takes in either i32 or i64 types for begin,
    // so we will always put a cast.
    Type signed_start_indices_element_type;

}

def TF_XlaDynamicSliceOp : TF_Op<"XlaDynamicSlice", [Pure, TF_NoConstantFold]> {
  let summary = "Wraps the XLA DynamicSlice operator, documented at";

  let description = [{
https://www.tensorflow.org/performance/xla/operation_semantics#dynamicslice
.

DynamicSlice extracts a sub-array from the input array at dynamic
start_indices. The size of the slice in each dimension is passed in