private:
  Scope scope_;
  std::unordered_map<int, Output> cache_;
  std::vector<const Edge*> control_deps_;
};

// Returns a node computing the size of the Slice op with inputs `slice_inputs`.
Status ComputeSliceSize(const Scope& host_scope,
                        const SliceInputs& slice_inputs,
                        std::vector<const Edge*> control_deps, Output* size) {
  // If slice_size[i] >= 0 then slice_size[i] = slice_size[i].