// Perform the operation. Returns true if it is finished. status perform() { return perform_func_(this); }
// Perform the operation. Returns true if it is finished. bool perform() { return perform_func_(this); }
// Perform the operation. Returns true if it is finished. status perform() { return perform_func_(this); }
// Perform the operation. Returns true if it is finished. bool perform() { return perform_func_(this); }