let extraClassDeclaration = [{
    // Returns the callee of this operation.
    func::FuncOp func() {
      return SymbolTable::lookupNearestSymbolFrom<func::FuncOp>(*this, getF());
    }

    // Erases variable arguments from `batch_func_op`. `erase_indices` contains
    // the indices of the arguments to erase.
    void eraseArguments(const BitVector& erase_indices);