Method ToString

tensorflow/compiler/jit/deadness_analysis.cc:287–290

        must_be_true_(must_be_true) {}

  string ToString() const override {
    return must_be_true() ? absl::StrCat("*", tensor_id_.ToString())
                          : tensor_id_.ToString();
  }

  Kind kind() const override { return Kind::kSymbol; }
  absl::Span<Predicate* const> GetOperands() const override { return {}; }