rewriter.getUnknownLoc(), rewriter.getNoneType(),
          rewriter.getUnitAttr());
      op.getInputGateBiasMutable().assign(none_value);
      return success();
    }

    if (EqualsZero(op.getProjectionBias())) {
      auto none_value = rewriter.create<TFL::NoValueOp>(
          rewriter.getUnknownLoc(), rewriter.getNoneType(),
          rewriter.getUnitAttr());

        // uninitialized variables, use the type information to construct a
        // dummy uninitialized variable operation.
        auto op = builder.create<mlir::tf_saved_model::GlobalTensorOp>(
            builder.getUnknownLoc(),
            builder.getStringAttr(object_names.GetSymbolTableName(node_id)),
            mlir::ElementsAttr(),
            /*type=*/mlir::TypeAttr::get(type),
            /*is_mutable=*/builder.getUnitAttr());